diff --git a/alerting/Dockerfile b/alerting/Dockerfile
index cc42b53..8e24c50 100644
--- a/alerting/Dockerfile
+++ b/alerting/Dockerfile
@@ -1,7 +1,7 @@
 # alerting never needs /proto (it talks to /api over plain HTTP, no gRPC),
 # so unlike api/ingest/search this build context is just alerting/ itself,
 # same shape as cli/Dockerfile:
-#   docker build -f alerting/Dockerfile -t sentry-alerting alerting/
+#   docker build -f alerting/Dockerfile -t cairnobs-alerting alerting/
 FROM golang:1.25-alpine AS builder
 WORKDIR /src
 COPY . .
diff --git a/alerting/README.md b/alerting/README.md
index 480a47f..5a33dad 100644
--- a/alerting/README.md
+++ b/alerting/README.md
@@ -11,7 +11,7 @@ correctness properties this implementation follows exactly).
 POSTGRES_PASSWORD=cairnobs-dev-only API_QUERY_URL=http://localhost:8080 go run ./cmd/alerting
 ```
 
-Talks to the same `sentry_metadata` Postgres database as `/api`
+Talks to the same `cairnobs_metadata` Postgres database as `/api`
 (different tables — see `/metadata/README.md`), and to `/api`'s
 `POST /query` over plain HTTP for rule evaluation. Never connects to
 ClickHouse or Tantivy directly.
@@ -48,8 +48,8 @@ only, not separate delivery paths.
 |---|---|
 | `HTTP_LISTEN_ADDR` | `:8081` |
 | `POSTGRES_ADDR` | `localhost:5432` |
-| `POSTGRES_DATABASE` | `sentry_metadata` |
-| `POSTGRES_USERNAME` | `sentry` |
+| `POSTGRES_DATABASE` | `cairnobs_metadata` |
+| `POSTGRES_USERNAME` | `cairnobs` |
 | `POSTGRES_PASSWORD` | (empty — must be set) |
 | `API_QUERY_URL` | `http://localhost:8080` |
 | `CORS_ALLOWED_ORIGIN` | `*` |
@@ -94,5 +94,5 @@ go test ./...
 ```
 
 ```sh
-docker build -f Dockerfile -t sentry-alerting .   # context is alerting/, not the repo root -- no /proto needed
+docker build -f Dockerfile -t cairnobs-alerting .   # context is alerting/, not the repo root -- no /proto needed
 ```
diff --git a/alerting/internal/config/config.go b/alerting/internal/config/config.go
index 42ad5e0..b5974db 100644
--- a/alerting/internal/config/config.go
+++ b/alerting/internal/config/config.go
@@ -72,8 +72,8 @@ func Load() (Config, error) {
 		HTTPListenAddr: getenv("HTTP_LISTEN_ADDR", ":8081"),
 		Postgres: PostgresConfig{
 			Addr:     getenv("POSTGRES_ADDR", "localhost:5432"),
-			Database: getenv("POSTGRES_DATABASE", "sentry_metadata"),
-			Username: getenv("POSTGRES_USERNAME", "sentry"),
+			Database: getenv("POSTGRES_DATABASE", "cairnobs_metadata"),
+			Username: getenv("POSTGRES_USERNAME", "cairnobs"),
 			Password: getenv("POSTGRES_PASSWORD", ""),
 		},
 		APIQueryURL: getenv("API_QUERY_URL", "http://localhost:8080"),
diff --git a/alerting/internal/sessioncheck/sessioncheck_integration_test.go b/alerting/internal/sessioncheck/sessioncheck_integration_test.go
index 9f04523..4f46bb0 100644
--- a/alerting/internal/sessioncheck/sessioncheck_integration_test.go
+++ b/alerting/internal/sessioncheck/sessioncheck_integration_test.go
@@ -37,7 +37,7 @@ func integrationPool(t *testing.T) *pgxpool.Pool {
 		t.Skip("SESSIONCHECK_TEST_POSTGRES_ADDR not set -- skipping live-Postgres integration test")
 	}
 	password := os.Getenv("SESSIONCHECK_TEST_POSTGRES_PASSWORD")
-	dsn := fmt.Sprintf("postgres://sentry:%s@%s/sentry_metadata", password, addr)
+	dsn := fmt.Sprintf("postgres://cairnobs:%s@%s/cairnobs_metadata", password, addr)
 	pool, err := pgxpool.New(context.Background(), dsn)
 	if err != nil {
 		t.Fatalf("opening pool: %v", err)
diff --git a/api/Dockerfile b/api/Dockerfile
index bf36a90..8117756 100644
--- a/api/Dockerfile
+++ b/api/Dockerfile
@@ -1,7 +1,7 @@
 # Build context must be the repo root (sentry/), since this needs both
 # api/ and proto/ (api now speaks gRPC to /search, using proto's checked-in
 # Go bindings via the `replace` directive in api/go.mod):
-#   docker build -f api/Dockerfile -t sentry-api .
+#   docker build -f api/Dockerfile -t cairnobs-api .
 
 FROM golang:1.25-alpine AS builder
 WORKDIR /src
diff --git a/api/README.md b/api/README.md
index 5c5b2b4..e19057b 100644
--- a/api/README.md
+++ b/api/README.md
@@ -46,7 +46,7 @@ Environment variables (see `internal/config/config.go`):
 |---|---|---|
 | `HTTP_LISTEN_ADDR` | `:8080` | |
 | `CLICKHOUSE_ADDR` | `localhost:9000` | Native protocol port |
-| `CLICKHOUSE_DATABASE` / `_USERNAME` / `_PASSWORD` | `sentry` / `default` / `` | |
+| `CLICKHOUSE_DATABASE` / `_USERNAME` / `_PASSWORD` | `cairnobs` / `default` / `` | |
 | `SEARCH_GRPC_ADDR` | `localhost:50052` | Must match `/search`'s `GRPC_LISTEN_ADDR` |
 | `QUERY_TIMEOUT_SECONDS` | `30` | Per-request timeout |
 | `CORS_ALLOWED_ORIGIN` | `*` | Wide open by default since there's no auth yet; tighten together |
@@ -66,7 +66,7 @@ go test ./...
 
 ```sh
 # from the repo root, not api/
-docker build -f api/Dockerfile -t sentry-api .
+docker build -f api/Dockerfile -t cairnobs-api .
 ```
 
 ## Testing notes
diff --git a/api/dashboards/store_integration_test.go b/api/dashboards/store_integration_test.go
index 89a2534..f384e99 100644
--- a/api/dashboards/store_integration_test.go
+++ b/api/dashboards/store_integration_test.go
@@ -32,7 +32,7 @@ func integrationStore(t *testing.T) (*Store, *pgxpool.Pool) {
 		t.Skip("DASHBOARDS_TEST_POSTGRES_ADDR not set -- skipping live-Postgres integration test")
 	}
 	password := os.Getenv("DASHBOARDS_TEST_POSTGRES_PASSWORD")
-	dsn := fmt.Sprintf("postgres://sentry:%s@%s/sentry_metadata", password, addr)
+	dsn := fmt.Sprintf("postgres://cairnobs:%s@%s/cairnobs_metadata", password, addr)
 	pool, err := pgxpool.New(context.Background(), dsn)
 	if err != nil {
 		t.Fatalf("opening pool: %v", err)
diff --git a/api/internal/config/config.go b/api/internal/config/config.go
index fa80084..cd5cacd 100644
--- a/api/internal/config/config.go
+++ b/api/internal/config/config.go
@@ -37,8 +37,8 @@ type LocalAuthConfig struct {
 	SessionTTL time.Duration
 	// CookieDomain empty means a host-only cookie (fine for local dev,
 	// where web/api are both localhost:<port>). Set to e.g.
-	// ".sentry.example.com" in production so the cookie is also sent to
-	// api.sentry.example.com/alerting.sentry.example.com.
+	// ".cairnobs.example.com" in production so the cookie is also sent to
+	// api.cairnobs.example.com/alerting.cairnobs.example.com.
 	CookieDomain string
 	// CookieSecure defaults true (never sent over plain HTTP) --
 	// deliberately opt-out via LOCAL_AUTH_COOKIE_SECURE=false, only
@@ -108,14 +108,14 @@ func Load() (Config, error) {
 		HTTPListenAddr: getenv("HTTP_LISTEN_ADDR", ":8080"),
 		ClickHouse: ClickHouseConfig{
 			Addr:     getenv("CLICKHOUSE_ADDR", "localhost:9000"),
-			Database: getenv("CLICKHOUSE_DATABASE", "sentry"),
+			Database: getenv("CLICKHOUSE_DATABASE", "cairnobs"),
 			Username: getenv("CLICKHOUSE_USERNAME", "default"),
 			Password: getenv("CLICKHOUSE_PASSWORD", ""),
 		},
 		Postgres: PostgresConfig{
 			Addr:     getenv("POSTGRES_ADDR", "localhost:5432"),
-			Database: getenv("POSTGRES_DATABASE", "sentry_metadata"),
-			Username: getenv("POSTGRES_USERNAME", "sentry"),
+			Database: getenv("POSTGRES_DATABASE", "cairnobs_metadata"),
+			Username: getenv("POSTGRES_USERNAME", "cairnobs"),
 			Password: getenv("POSTGRES_PASSWORD", ""),
 		},
 		// Search service's gRPC address (see /search) -- default matches
diff --git a/api/localauth/store_integration_test.go b/api/localauth/store_integration_test.go
index 5b11ec0..5d23feb 100644
--- a/api/localauth/store_integration_test.go
+++ b/api/localauth/store_integration_test.go
@@ -35,7 +35,7 @@ func integrationStore(t *testing.T) *Store {
 		t.Skip("LOCALAUTH_TEST_POSTGRES_ADDR not set -- skipping live-Postgres integration test")
 	}
 	password := os.Getenv("LOCALAUTH_TEST_POSTGRES_PASSWORD")
-	dsn := fmt.Sprintf("postgres://sentry:%s@%s/sentry_metadata", password, addr)
+	dsn := fmt.Sprintf("postgres://cairnobs:%s@%s/cairnobs_metadata", password, addr)
 	pool, err := pgxpool.New(context.Background(), dsn)
 	if err != nil {
 		t.Fatalf("opening pool: %v", err)
@@ -285,3 +285,4 @@ func TestIntegrationGetPasswordHashByID(t *testing.T) {
 		t.Errorf("GetPasswordHashByID for an unknown ID: err = %v, want ErrNotFound", err)
 	}
 }
+
diff --git a/docker-compose.yml b/docker-compose.yml
index 0066aff..0eb7dac 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -38,7 +38,7 @@ services:
       timeout: 5s
       retries: 30
 
-  # One-shot: creates the sentry.logs.raw topic, then exits 0. ingest
+  # One-shot: creates the cairnobs.logs.raw topic, then exits 0. ingest
   # waits on this completing successfully before it starts.
   redpanda-provision:
     build:
@@ -120,13 +120,13 @@ services:
     image: postgres:16-alpine
     container_name: cairnobs-metadata-postgres
     environment:
-      POSTGRES_DB: sentry_metadata
-      POSTGRES_USER: sentry
+      POSTGRES_DB: cairnobs_metadata
+      POSTGRES_USER: cairnobs
       POSTGRES_PASSWORD: "cairnobs-dev-only" # not a real secret, same framing as CLICKHOUSE_PASSWORD above
     volumes:
       - metadata-postgres-data:/var/lib/postgresql/data
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U sentry -d sentry_metadata"]
+      test: ["CMD-SHELL", "pg_isready -U cairnobs -d cairnobs_metadata"]
       interval: 5s
       timeout: 5s
       retries: 30
@@ -143,12 +143,12 @@ services:
     environment:
       POSTGRES_HOST: "metadata-postgres"
       POSTGRES_PORT: "5432"
-      POSTGRES_USER: "sentry"
+      POSTGRES_USER: "cairnobs"
       POSTGRES_PASSWORD: "cairnobs-dev-only"
-      POSTGRES_DATABASE: "sentry_metadata"
+      POSTGRES_DATABASE: "cairnobs_metadata"
       # Password for the restricted audit_writer Postgres role (Phase 4
       # task 4) -- INSERT+SELECT only on audit_log, never UPDATE/DELETE,
-      # via its own connection pool distinct from the shared "sentry"
+      # via its own connection pool distinct from the shared "cairnobs"
       # role every other store uses. See /docs/phase-4-isolation-design.md.
       AUDIT_WRITER_PASSWORD: "audit-writer-dev-only"
 
@@ -185,19 +185,19 @@ services:
       # compose file provisions one.
       #
       # AGENT_REGISTRY_POSTGRES_ADDR enables agent inventory/remote
-      # config (see /docs/agent-management-design.md) -- same "sentry"
+      # config (see /docs/agent-management-design.md) -- same "cairnobs"
       # shared Postgres role api/dashboards already uses (agent
       # inventory carries no tamper-evidence requirement, unlike
       # audit_log's dedicated restricted role). Set here (unlike
       # ENTERPRISE_AUTH_URL above) since this feature has no multi-
       # tenancy prerequisite -- it works the same in single-tenant core.
       AGENT_REGISTRY_POSTGRES_ADDR: "metadata-postgres:5432"
-      AGENT_REGISTRY_POSTGRES_USERNAME: "sentry"
+      AGENT_REGISTRY_POSTGRES_USERNAME: "cairnobs"
       AGENT_REGISTRY_POSTGRES_PASSWORD: "cairnobs-dev-only"
     volumes:
       - ./hack/dev-certs/out:/etc/cairnobs-ingest:ro
 
-  # Reads the same sentry.logs.raw topic ingest's consumer does (own
+  # Reads the same cairnobs.logs.raw topic ingest's consumer does (own
   # offset tracking, own failure domain — see /search/README.md) and
   # builds a Tantivy full-text index over the message field.
   search:
@@ -255,8 +255,8 @@ services:
       CLICKHOUSE_PASSWORD: "cairnobs-dev-only"
       SEARCH_GRPC_ADDR: "search:50052"
       POSTGRES_ADDR: "metadata-postgres:5432"
-      POSTGRES_DATABASE: "sentry_metadata"
-      POSTGRES_USERNAME: "sentry"
+      POSTGRES_DATABASE: "cairnobs_metadata"
+      POSTGRES_USERNAME: "cairnobs"
       POSTGRES_PASSWORD: "cairnobs-dev-only"
     healthcheck:
       # alerting (Phase 3 task 5) depends_on api -- without this, that
@@ -293,8 +293,8 @@ services:
       - "8081:8081"
     environment:
       POSTGRES_ADDR: "metadata-postgres:5432"
-      POSTGRES_DATABASE: "sentry_metadata"
-      POSTGRES_USERNAME: "sentry"
+      POSTGRES_DATABASE: "cairnobs_metadata"
+      POSTGRES_USERNAME: "cairnobs"
       POSTGRES_PASSWORD: "cairnobs-dev-only"
       # Resolves to whichever of api/enterprise-api is actually active --
       # enterprise-api declares a `default.aliases: [api]` network alias
@@ -337,8 +337,8 @@ services:
       # secret. Must be at least 32 bytes (see internal/config.Load).
       ENTERPRISE_SESSION_SIGNING_KEY: "cairnobs-dev-only-session-signing-key-32bytes+"
       POSTGRES_ADDR: "metadata-postgres:5432"
-      POSTGRES_DATABASE: "sentry_metadata"
-      POSTGRES_USERNAME: "sentry"
+      POSTGRES_DATABASE: "cairnobs_metadata"
+      POSTGRES_USERNAME: "cairnobs"
       POSTGRES_PASSWORD: "cairnobs-dev-only"
       # Where the browser lands after internal/loginhandler sets a
       # session cookie -- web's mapped host port (see web's build args
@@ -391,8 +391,8 @@ services:
       CLICKHOUSE_ADMIN_PASSWORD: "cairnobs-dev-only"
       SEARCH_GRPC_ADDR: "search:50052"
       POSTGRES_ADDR: "metadata-postgres:5432"
-      POSTGRES_DATABASE: "sentry_metadata"
-      POSTGRES_USERNAME: "sentry"
+      POSTGRES_DATABASE: "cairnobs_metadata"
+      POSTGRES_USERNAME: "cairnobs"
       POSTGRES_PASSWORD: "cairnobs-dev-only"
       AUDIT_WRITER_USERNAME: "audit_writer"
       AUDIT_WRITER_PASSWORD: "audit-writer-dev-only"
@@ -434,8 +434,8 @@ services:
       REDPANDA_BROKERS: "redpanda:9092"
       CLICKHOUSE_ADDR: "clickhouse:9000"
       POSTGRES_ADDR: "metadata-postgres:5432"
-      POSTGRES_DATABASE: "sentry_metadata"
-      POSTGRES_USERNAME: "sentry"
+      POSTGRES_DATABASE: "cairnobs_metadata"
+      POSTGRES_USERNAME: "cairnobs"
       POSTGRES_PASSWORD: "cairnobs-dev-only"
     healthcheck:
       test: ["CMD", "/enterprise-ingest", "-healthcheck"]
diff --git a/docs/agent-management-design.md b/docs/agent-management-design.md
index f8ea8f1..49f7797 100644
--- a/docs/agent-management-design.md
+++ b/docs/agent-management-design.md
@@ -135,7 +135,7 @@ already configured for.
 ## Data model
 
 `metadata/migrations/0037_create_agents.sql`: one `agents` table, one
-row per `(tenant_id, host)`, in the same `sentry_metadata` Postgres
+row per `(tenant_id, host)`, in the same `cairnobs_metadata` Postgres
 dashboards/alert_rules already live in — not a new database, matching
 this project's established "shared schema, different services own
 different tables" shape. `tenant_id` defaults to `'default'` for
@@ -257,18 +257,18 @@ the process exits cleanly -- `pending_command` confirmed cleared and
 
 ## CLI surface (punch-list item 3)
 
-`sentryctl agents` (`cli/cmd/sentryctl/cmd_agents.go`), same list/get
+`cairnobsctl agents` (`cli/cmd/cairnobsctl/cmd_agents.go`), same list/get
 shape as `dashboards`/`alerts`, plus a `config` sub-subcommand
 (mirroring `dashboards permissions`) since an override has its own
 get/set/clear lifecycle distinct from the agent resource itself:
 
 ```
-sentryctl agents list|get <host>
-sentryctl agents config get <host>|clear <host>
-sentryctl agents config set <host> [--batch-max-size N] [--batch-flush-interval-ms N]
+cairnobsctl agents list|get <host>
+cairnobsctl agents config get <host>|clear <host>
+cairnobsctl agents config set <host> [--batch-max-size N] [--batch-flush-interval-ms N]
                             [--heartbeat-enabled true|false] [--heartbeat-interval-ms N]
                             [--journald-unit UNIT]
-sentryctl agents restart <host> [--yes]
+cairnobsctl agents restart <host> [--yes]
 ```
 
 `config set` is the one command with real logic beyond a thin HTTP
diff --git a/docs/architecture.md b/docs/architecture.md
index 7d18052..a0b52c0 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -81,7 +81,7 @@ This split is not to be changed without discussion — see CLAUDE.md.
 | `alerting` (Go, Phase 3) | Evaluates alert rules on an interval, calls `api`'s `POST /query` (via a `RoleService` credential once Phase 4 auth is configured — see `/docs/phase-4-isolation-design.md`'s alerting↔api gap), delivers firing/resolved notifications (webhook/Slack/PagerDuty). |
 | `enterprise` (Go, AGPLv3 — see "Licensing boundary" below, Phase 4) | OIDC login (`internal/loginhandler`'s `/auth/oidc/login`+`/auth/oidc/callback`) and SAML login (`/auth/saml/login`+`/auth/saml/acs`, via `internal/saml`'s `crewjam/saml` wiring) — both a real IdP round trip, each verified with a real fake IdP (`coreos/go-oidc`'s `oidctest`, `crewjam/saml`'s `samlidp`) but not a real external one, RBAC storage (`internal/rbacstore`), session/service-token issuance (`internal/session`), the append-only audit log (`internal/audit`), `enterprise-auth`'s HTTP surface (`/internal/authorize`, `/auth/features`), per-tenant ClickHouse provisioning (`internal/tenantprovision`) and query routing (`internal/chrunner`), and `cmd/enterprise-api` — a second binary combining core's `api/queryapi`/`api/dashboards` handlers with these tenant-aware implementations. Never imported by core — see "Licensing boundary" below. Also `internal/searchclient` (per-tenant Tantivy routing, wired the same way into `search`). |
 | `web` (SvelteKit, static build) | Query bar, dashboards, alerts, and (Phase 4) a settings page that renders SSO status via a runtime capability check (`GET /auth/features`) rather than bundling `enterprise/`'s components directly — an architectural choice (core builds and runs standalone) that predates and doesn't depend on Phase 6's relicensing. |
-| `cli` (`sentryctl`) | `ping`, `query`, `dashboards` (list/get/apply), `alerts` (list/get/apply). `$SENTRYCTL_TOKEN`, if set, is forwarded as a Bearer credential (Phase 4). |
+| `cli` (`cairnobsctl`) | `ping`, `query`, `dashboards` (list/get/apply), `alerts` (list/get/apply). `$CAIRNOBSCTL_TOKEN`, if set, is forwarded as a Bearer credential (Phase 4). |
 | `deploy` | A Helm chart covering every `docker-compose.yml` service, plus (Phase 4) a small Go Operator managing one CRD (`Tenant`) that provisions a per-tenant ClickHouse credential Secret. Never applied to a live cluster in the environment this was built in — see `/deploy/README.md`'s verification section before trusting it. |
 
 ## Tenant isolation model (Phase 4)
@@ -199,7 +199,7 @@ escape hatch is opaque to any compiler-injected filter.
   new credentials and still never touches ClickHouse/Postgres.
 
 **The deployment-topology gap is closed for both Helm and
-docker-compose**: `deploy/helm/sentry/templates/api.yaml`/
+docker-compose**: `deploy/helm/cairnobs/templates/api.yaml`/
 `enterprise-api.yaml` are mutually exclusive on `enterprise.enabled`,
 rendering to the same Service name and port either way, so a
 Helm-deployed cluster can't accidentally run the wrong binary — the same
diff --git a/docs/compliance/license-inventory.json b/docs/compliance/license-inventory.json
index f0de707..55d7e70 100644
--- a/docs/compliance/license-inventory.json
+++ b/docs/compliance/license-inventory.json
@@ -8510,7 +8510,7 @@
     "direct_or_transitive": "direct",
     "ecosystem": "docker-image",
     "flagged": "True",
-    "flag_reason": "Category (c): BSL is explicitly source-available, not OSI-approved open source, per the audit's own classification framework. Verified against the actual licenses/bsl.md at the v24.2.7 tag, not assumed. No AGPL linking-compatibility issue (Redpanda is consumed only over the Kafka wire protocol, never linked into Sentry's own code -- same relationship as ClickHouse/Postgres). Real open question: whether a third party self-hosting Sentry (now fully AGPLv3 per task 6) 'as a service' would trip BSL's Streaming-or-Queuing-Service restriction on the bundled Redpanda image -- Sentry's ingest pipeline creates fixed internal topics, not per-end-user topics, so this is very likely NOT a Streaming-or-Queuing-Service under BSL's own definition, but this is a business/redistribution judgment call, not a pure technical one -- flagged for your decision, not resolved unilaterally. See license-audit-report.md's Redpanda section for the three remediation options (accept as-is / swap to Apache Kafka / flag only). RESOLVED 2026-08-16 (business decision): accept as-is. Sentry's own use (internal Kafka-protocol transport, no resale of broker access) is within BSL's Additional Use Grant; the third-party self-hosting-as-a-service question was judged unlikely to trip BSL's Streaming-or-Queuing-Service restriction, and was accepted as a known, disclosed risk rather than swapping to a heavier broker or dropping the bundled image. See license-audit-report.md's Redpanda section.",
+    "flag_reason": "Category (c): BSL is explicitly source-available, not OSI-approved open source, per the audit's own classification framework. Verified against the actual licenses/bsl.md at the v24.2.7 tag, not assumed. No AGPL linking-compatibility issue (Redpanda is consumed only over the Kafka wire protocol, never linked into Cairn OBS's own code -- same relationship as ClickHouse/Postgres). Real open question: whether a third party self-hosting Cairn OBS (now fully AGPLv3 per task 6) 'as a service' would trip BSL's Streaming-or-Queuing-Service restriction on the bundled Redpanda image -- Cairn OBS's ingest pipeline creates fixed internal topics, not per-end-user topics, so this is very likely NOT a Streaming-or-Queuing-Service under BSL's own definition, but this is a business/redistribution judgment call, not a pure technical one -- flagged for your decision, not resolved unilaterally. See license-audit-report.md's Redpanda section for the three remediation options (accept as-is / swap to Apache Kafka / flag only). RESOLVED 2026-08-16 (business decision): accept as-is. Cairn OBS's own use (internal Kafka-protocol transport, no resale of broker access) is within BSL's Additional Use Grant; the third-party self-hosting-as-a-service question was judged unlikely to trip BSL's Streaming-or-Queuing-Service restriction, and was accepted as a known, disclosed risk rather than swapping to a heavier broker or dropping the bundled image. See license-audit-report.md's Redpanda section.",
     "classification": "c"
   },
   {
diff --git a/docs/phase-0-runbook.md b/docs/phase-0-runbook.md
index 62428b7..ae68f24 100644
--- a/docs/phase-0-runbook.md
+++ b/docs/phase-0-runbook.md
@@ -49,7 +49,7 @@ docker compose up -d --build
 ```
 
 This builds and starts, in dependency order: `redpanda` → `redpanda-provision`
-(creates the `sentry.logs.raw` topic, then exits) → `clickhouse` →
+(creates the `cairnobs.logs.raw` topic, then exits) → `clickhouse` →
 `clickhouse-migrate` (applies `/storage/migrations`, then exits) →
 `ingest` and `api` → `web`.
 
@@ -133,7 +133,7 @@ In another terminal, **after** the agent is running and connected
 started won't be picked up):
 
 ```sh
-logger "hello from sentry phase 0"
+logger "hello from cairnobs phase 0"
 ```
 
 `logger` (part of util-linux, present on virtually every Linux distro)
@@ -150,7 +150,7 @@ interval by default, so the line won't hit ingest instantly.
 starts every service in the file). Open `http://localhost:3000`, run the
 default query (`SELECT * FROM logs
 ORDER BY timestamp DESC LIMIT 100`), and look for a row with
-`message = "hello from sentry phase 0"`.
+`message = "hello from cairnobs phase 0"`.
 
 **Or via curl, if you want to skip the browser:**
 
@@ -160,11 +160,11 @@ curl -X POST http://localhost:8080/query \
   -d '{"sql": "SELECT * FROM logs ORDER BY timestamp DESC LIMIT 10"}'
 ```
 
-**Or via sentryctl, just to confirm api is up (doesn't check the data
+**Or via cairnobsctl, just to confirm api is up (doesn't check the data
 itself):**
 
 ```sh
-cd cli && go run ./cmd/sentryctl ping
+cd cli && go run ./cmd/cairnobsctl ping
 ```
 
 If you see the row: that's Phase 0 done, end to end. If you don't, see
@@ -199,7 +199,7 @@ Check each hop in order rather than guessing:
    at-least-once design (see `/ingest/README.md`), so this may just need
    more time rather than intervention.
 3. `docker compose exec redpanda rpk topic list` — confirm
-   `sentry.logs.raw` exists (if `redpanda-provision` failed, it won't).
+   `cairnobs.logs.raw` exists (if `redpanda-provision` failed, it won't).
 
 **`docker compose up` fails on `service_completed_successfully`.**
 You're likely on Compose v1 (`docker-compose`, hyphenated) rather than v2
diff --git a/docs/phase-1-runbook.md b/docs/phase-1-runbook.md
index 1ee14ae..bc4c633 100644
--- a/docs/phase-1-runbook.md
+++ b/docs/phase-1-runbook.md
@@ -54,7 +54,7 @@ docker compose logs search
 ```
 
 You should see "search gRPC server listening" and rskafka connecting to
-all of `sentry.logs.raw`'s partitions. If you see nothing at all, check
+all of `cairnobs.logs.raw`'s partitions. If you see nothing at all, check
 `RUST_LOG=info` is set on the `search` service in `docker-compose.yml`.
 
 ### A2. Generate a log line and confirm both query paths agree
diff --git a/docs/phase-3-runbook.md b/docs/phase-3-runbook.md
index daf198f..d145ac7 100644
--- a/docs/phase-3-runbook.md
+++ b/docs/phase-3-runbook.md
@@ -43,10 +43,10 @@ go run . --count 500000
 
 Create a dashboard and a couple of panels, either through the web UI
 (`http://localhost:3000/dashboards` → "+ Create" → "+ Add panel") or via
-`sentryctl`:
+`cairnobsctl`:
 
 ```sh
-sentryctl dashboards apply my-dashboard.json   # shape = GET /dashboards/{id}/export
+cairnobsctl dashboards apply my-dashboard.json   # shape = GET /dashboards/{id}/export
 ```
 
 **Verified live**: a table panel (`severity=INFO | head 10`) and a bar
@@ -95,7 +95,7 @@ Bring up a local webhook receiver for testing (no real Slack/PagerDuty
 needed):
 
 ```sh
-docker run -d --name sentry-webhook-sink --network sentry_default \
+docker run -d --name cairnobs-webhook-sink --network sentry_default \
   -p 9099:9099 -v $(pwd)/hack/webhook-sink:/src -w /src golang:1.25-alpine go run .
 ```
 
@@ -104,7 +104,7 @@ Create a notification target and a rule, either via the web UI
 
 ```sh
 curl -X POST http://localhost:8081/targets -H 'Content-Type: application/json' -d '{
-  "name": "local sink", "kind": "webhook", "webhook_url": "http://sentry-webhook-sink:9099/"
+  "name": "local sink", "kind": "webhook", "webhook_url": "http://cairnobs-webhook-sink:9099/"
 }'
 
 curl -X POST http://localhost:8081/rules -H 'Content-Type: application/json' -d '{
@@ -119,7 +119,7 @@ curl -X POST http://localhost:8081/rules -H 'Content-Type: application/json' -d
 rule via the `/alerts/new` form, watched it transition in the browser):
 the rule transitions `ok` → `firing` on its first evaluation
 (`for_minutes: 0`), the delivery log shows `firing / sent / 200`, and
-`docker logs sentry-webhook-sink` shows the real received payload.
+`docker logs cairnobs-webhook-sink` shows the real received payload.
 
 Also verified live: a threshold rule whose query returns **zero rows**
 records `last_eval_status: "error"` with the exact expected message
@@ -205,13 +205,13 @@ already claimed. Moving off a single-process ticker to a distributed
 scheduler, and materially larger rule counts (10,000+), are both
 explicitly out of scope for this phase.
 
-## 5. Confirm `sentryctl`
+## 5. Confirm `cairnobsctl`
 
 ```sh
-sentryctl dashboards list
-sentryctl dashboards apply exported-dashboard.json
-sentryctl alerts list
-sentryctl alerts apply rule.json
+cairnobsctl dashboards list
+cairnobsctl dashboards apply exported-dashboard.json
+cairnobsctl alerts list
+cairnobsctl alerts apply rule.json
 ```
 
 Both `dashboards` and `alerts` hit the exact same REST endpoints the web
diff --git a/docs/phase-4-rbac-design.md b/docs/phase-4-rbac-design.md
index a50c26a..5d184bd 100644
--- a/docs/phase-4-rbac-design.md
+++ b/docs/phase-4-rbac-design.md
@@ -108,7 +108,7 @@ yet. Stated plainly so this doesn't read as more built than it is.
 
 ## Schema
 
-Lives in `/metadata` (`sentry_metadata`), alongside everything else from
+Lives in `/metadata` (`cairnobs_metadata`), alongside everything else from
 Phase 3, per `/docs/phase-4-isolation-design.md`'s existing schema
 additions (`tenants`, the `tenant_id` backfill on `alert_state`/
 `delivery_log`). New tables, continuing that migration sequence:
diff --git a/docs/phase-7-ai-design.md b/docs/phase-7-ai-design.md
index c3a086f..7b869ef 100644
--- a/docs/phase-7-ai-design.md
+++ b/docs/phase-7-ai-design.md
@@ -265,7 +265,7 @@ with three levels (`ok`/`warn`/`reject`) and human-readable reasons:
   query"), decided here rather than left ambiguous: hand-written queries
   get the identical assessment an AI-generated one would, so there's
   real parity, but retroactively hard-blocking existing dashboard/
-  `sentryctl` query patterns that happen to have no time bound is a
+  `cairnobsctl` query patterns that happen to have no time bound is a
   behavioral change this phase didn't set out to make and could break
   real existing usage. `warnings` is `omitempty` -- a client that
   doesn't look for it sees no shape change at all. All existing
@@ -472,7 +472,7 @@ renders them is structurally the same conditional-message pattern
 already live-verified repeatedly for Explain/Fix/Optimize's own
 "unavailable" states, not new untested UI shape.
 
-CLI (task 11): `sentryctl query --nl "..."` in `cli/cmd/sentryctl/cmd_query.go`.
+CLI (task 11): `cairnobsctl query --nl "..."` in `cli/cmd/cairnobsctl/cmd_query.go`.
 Same posture as the UI, enforced identically regardless of how the
 result was produced: a low-confidence, non-compiling, or cost-guard-blocked
 translation is never run, even with `--execute` -- confirmed by
@@ -559,7 +559,7 @@ query at the moment of acceptance, not tracked keystroke-by-keystroke.
 
 **Genuinely verified against a live Postgres**, not just unit-tested
 against a fake `InteractionLogger`: `metadata/migrations/0036` was
-applied to the running dev stack's `sentry-metadata-postgres`
+applied to the running dev stack's `cairnobs-metadata-postgres`
 (`docker compose up -d --build metadata-migrate`, confirmed via `\d+
 audit_log` before/after showing `ai_interaction` added to the
 `event_type` CHECK constraint), and two new tests in
@@ -622,7 +622,7 @@ ends up with:
    handler/routing logic via `fakeProvider` -- fast, deterministic, no
    network, all run in CI today.
 2. **Integration tests** (this task, new): the mock-Ollama-server suite
-   above, plus `cli/cmd/sentryctl/cmd_query_test.go`'s existing
+   above, plus `cli/cmd/cairnobsctl/cmd_query_test.go`'s existing
    `httptest.Server`-backed coverage of `--nl`/`--execute` (already
    written during Track B, task 11) -- proves the plumbing (HTTP routing,
    JSON contracts, `planner.Compile`/`costguard.Assess` integration,
diff --git a/docs/phase-7-runbook.md b/docs/phase-7-runbook.md
index e0b9fc4..f5f707e 100644
--- a/docs/phase-7-runbook.md
+++ b/docs/phase-7-runbook.md
@@ -12,7 +12,7 @@ document is verification only.
 Every AI operation (`complete`, `explain`, `fix`, `optimize`,
 `translate`, and the audit-logging endpoint behind it) has been run
 end-to-end against a real `docker compose` stack — real HTTP requests
-into the real `sentry-api` container, through the real
+into the real `cairnobs-api` container, through the real
 `api/ai/provider/ollama.Client`, over a real network call, into a real
 process answering Ollama's actual `/api/chat` wire contract. **No real
 model weights are used anywhere in this verification** — see
@@ -74,7 +74,7 @@ Run it as a container on the compose network with a network alias of
 `OLLAMA_BASE_URL` at it via a throwaway compose override:
 
 ```sh
-docker run -d --rm --name sentry-mock-ollama --network sentry_default --network-alias ollama \
+docker run -d --rm --name cairnobs-mock-ollama --network sentry_default --network-alias ollama \
   -v "$(pwd)/hack/mock-ollama:/src" -w /src golang:1.25-alpine \
   sh -c "go build -o /tmp/mock-ollama . && /tmp/mock-ollama"
 
@@ -106,7 +106,7 @@ wired into a stack anyone else might reach:
 
 ```sh
 docker compose up -d api   # drops back to the plain env, no -f override
-docker rm -f sentry-mock-ollama
+docker rm -f cairnobs-mock-ollama
 rm /tmp/docker-compose.ai-verify.yml
 curl -s -o /dev/null -w '%{http_code}\n' -X POST localhost:8080/ai/translate -d '{}'
 # 404 -- confirms AI routes are unregistered again
@@ -118,7 +118,7 @@ With AI routes enabled (step 2) and the web dev server running against
 `localhost:8080`, open the Search page's query bar:
 
 - Type a partial query and pause — ghost text should appear inline
-  after ~300ms; Tab accepts it. Stop `sentry-mock-ollama` and confirm
+  after ~300ms; Tab accepts it. Stop `cairnobs-mock-ollama` and confirm
   ghost text just silently stops appearing (no error toast, no
   console noise) — this is the "graceful degradation" requirement,
   not incidental behavior.
@@ -149,7 +149,7 @@ separately click "Run query".
 CLI:
 
 ```sh
-cd cli && go run ./cmd/sentryctl query --nl "errors in the last hour" --api http://localhost:8080
+cd cli && go run ./cmd/cairnobsctl query --nl "errors in the last hour" --api http://localhost:8080
 # prints the translated query and, in an interactive terminal, prompts y/N before running
 ```
 
@@ -164,7 +164,7 @@ pattern applied to that service instead:
 1. Accept or dismiss a Fix/Optimize/Translate suggestion in the web UI.
 2. Confirm a row landed in `audit_log`:
    ```sh
-   docker exec sentry-metadata-postgres psql -U sentry -d sentry_metadata \
+   docker exec cairnobs-metadata-postgres psql -U cairnobs -d cairnobs_metadata \
      -c "SELECT event_type, query_text, detail FROM audit_log WHERE event_type='ai_interaction' ORDER BY id DESC LIMIT 5;"
    ```
    `detail` should show `operation`/`accepted`/`edited` matching what you
diff --git a/docs/query-language-design.md b/docs/query-language-design.md
index 57be6ee..ebf9fd3 100644
--- a/docs/query-language-design.md
+++ b/docs/query-language-design.md
@@ -23,8 +23,15 @@ new cross-backend join strategy from scratch.
 Pipe syntax, SPL-inspired, EBNF-ish:
 
 ```
-query        := base_search ("|" pipe_stage)*
+query        := (base_search | pipe_stage) ("|" pipe_stage)*
 base_search  := bool_expr                      // implicit filter/search, SPL convention
+                                                // omitted entirely when the query starts
+                                                // directly with a pipe-stage keyword (e.g.
+                                                // `stats count by host`, no leading filter,
+                                                // no leading "|") -- means match-everything.
+                                                // A field genuinely named "where"/"stats"/etc
+                                                // still parses as a filter (`where=foo`),
+                                                // disambiguated by comparator lookahead.
 pipe_stage   := "where" bool_expr
               | "stats" agg_call ("," agg_call)* ["by" field ("," field)*]
               | "sort" sort_field ("," sort_field)*
diff --git a/docs/security/threat-model.md b/docs/security/threat-model.md
index 408db70..b2b63d9 100644
--- a/docs/security/threat-model.md
+++ b/docs/security/threat-model.md
@@ -97,13 +97,13 @@ wire-level `SearchRequest` carries the right `tenant_id`. All pass, for
 real, no disclaimer needed for this specific claim.
 
 **Both Helm and docker-compose now close this.**
-`deploy/helm/sentry/templates/api.yaml` and `enterprise-api.yaml` are
+`deploy/helm/cairnobs/templates/api.yaml` and `enterprise-api.yaml` are
 mutually exclusive, gated on opposite sides of the same
 `enterprise.enabled` flag, rendering to the same Service name/port — so
 a Helm-deployed cluster runs exactly one of the two binaries, chosen by
 the same flag that turns on RBAC/audit/SSO, not a second
 independently-forgettable decision. Verified by parsing (not
-eyeballing) the rendered YAML under both values: exactly one `sentry-api`
+eyeballing) the rendered YAML under both values: exactly one `cairnobs-api`
 Deployment either way, with the right image. `docker-compose.yml`'s
 `api`/`enterprise-api` services are now the analogous mutually-exclusive
 choice, gated behind `COMPOSE_PROFILES` (`.env` checks in
@@ -233,7 +233,7 @@ Browser ──▶ enterprise-auth (GET /auth/oidc/login, /auth/oidc/callback)
               └─▶ external IdP (OIDC authorization code flow)
               └─▶ Postgres (rbacstore: users, tenant_memberships)
 
-sentryctl ──▶ api, alerting (Bearer token when SENTRYCTL_TOKEN is set)
+cairnobsctl ──▶ api, alerting (Bearer token when CAIRNOBSCTL_TOKEN is set)
 ```
 
 Ingest path (agent → Redpanda → ingest → ClickHouse, and Redpanda →
@@ -442,12 +442,12 @@ layer":
 
 1. A dedicated `audit_writer` Postgres role with only `INSERT`+`SELECT`
    grants (`metadata/migrations/0012-0014`), via its **own**
-   `pgxpool.Pool` — never the shared `sentry` role/pool every other
+   `pgxpool.Pool` — never the shared `cairnobs` role/pool every other
    store uses.
 2. A `BEFORE UPDATE OR DELETE ... RAISE EXCEPTION` trigger
    (`metadata/migrations/0015-0016`) that rejects the operation for
    *any* role, including the table owner — confirmed live: even the
-   `sentry` role cannot `UPDATE` a row without first disabling the
+   `cairnobs` role cannot `UPDATE` a row without first disabling the
    trigger, a privileged operation distinct from ordinary application
    access.
 
@@ -547,10 +547,10 @@ terms:
   cluster/trusted network (`api`/`alerting`/`web`), never exposed
   publicly. Nothing in this codebase enforces that at the network layer;
   it's a deployment responsibility (NetworkPolicy, or equivalent) not
-  yet codified in `/deploy/helm/sentry`.
+  yet codified in `/deploy/helm/cairnobs`.
 - `ENTERPRISE_SESSION_SIGNING_KEY`, ClickHouse/Postgres passwords, and
   (once minted) the `alerting` service token are all K8s `Secret`
-  objects in the Helm chart (`/deploy/helm/sentry/templates/
+  objects in the Helm chart (`/deploy/helm/cairnobs/templates/
   secrets.yaml`) — standard K8s `Secret` semantics apply (base64, not
   encrypted at rest without a cluster-level `EncryptionConfiguration`).
   No secrets-manager integration (Vault, cloud KMS) exists; the chart
@@ -571,7 +571,7 @@ terms:
 | Ingest tenant *identity* (credential validation, tagging) | **Built and tested** — fail-closed `TenantResolver`, `tenant_id` Kafka header attached per record |
 | Ingest tenant *write-routing*, ClickHouse | **Enforced, verified live** — `enterprise-ingest`/`chwriter.Registry` route each tagged batch to its tenant's own database, fail-closed on an untagged/unprovisioned tenant; both Docker-free and live-ClickHouse tests pass. Active-tenant snapshot refreshes every minute (`Registry.StartRefreshing`) — a deprovisioned tenant loses write access within a minute, not "until the next restart" |
 | Ingest tenant *write-routing*, Tantivy | **Built and genuinely verified** — `search/src/consumer.rs` routes each record into its own tenant's index via `IndexRegistry`, same registry the (already-verified) read side uses; no Docker needed, real tests pass. Active-tenant-gated too: `tenants::ActiveTenantTracker` polls `enterprise-auth` every 60s (off unless configured), refusing any tenant not in the polled allowlist — same one-minute staleness bound as ClickHouse's now-refreshing snapshot, no more asymmetry between the two |
-| Deployment actually routing traffic to `enterprise-api` (Helm) | **Enforced, verified live** — `api`/`enterprise-api` are mutually exclusive, same flag as RBAC/audit/SSO; a real `helm install` against a real `kind` cluster confirmed the `sentry-api` Deployment runs `sentry-enterprise-api:latest` with `enterprise.enabled=true`, real endpoints behind the `sentry-api` Service, not just `helm template`'s rendered YAML |
+| Deployment actually routing traffic to `enterprise-api` (Helm) | **Enforced, verified live** — `api`/`enterprise-api` are mutually exclusive, same flag as RBAC/audit/SSO; a real `helm install` against a real `kind` cluster confirmed the `cairnobs-api` Deployment runs `cairnobs-enterprise-api:latest` with `enterprise.enabled=true`, real endpoints behind the `cairnobs-api` Service, not just `helm template`'s rendered YAML |
 | Deployment actually routing traffic to `enterprise-api` (docker-compose) | **Enforced, verified live** — `api`/`enterprise-api` are mutually exclusive via `COMPOSE_PROFILES`, same flag choice as Helm's `enterprise.enabled`; a real `docker compose up` of `enterprise-api` was run in this environment (and caught/fixed a startup-crashing duplicate `GET /healthz` route registration bug in the process), not just `docker compose config` |
 | Human SSO login — OIDC | **Enforced, verified live** — real login against a real Auth0 developer tenant, full browser round trip; correctly failed closed on an identity with no `tenant_memberships` row, then succeeded and issued a real session after `-grant-membership-*`, with `POST /internal/authorize` returning exactly the granted tenant/role |
 | Human SSO login — SAML | **Enforced, verified live** — real login against Auth0's SAML2 Web App addon acting as a real SAML IdP, over real (self-signed, dev-only) TLS; a real signed assertion validated (audience, destination, signature), landed on `/select-tenant` with real memberships, and `POST /internal/authorize` confirmed the selected tenant/role. Found and fixed a real bug in the process: `loginhandler.go`'s cookies decided `Secure` from `r.TLS != nil` alone, which is wrong behind any TLS-terminating reverse proxy (the deployment shape this handler actually runs in) — `enterprise-auth` never terminates TLS itself, so `r.TLS` was nil even over a genuinely HTTPS connection, silently dropping `Secure` and breaking SAML's `SameSite=None` cookie |
diff --git a/enterprise/Dockerfile b/enterprise/Dockerfile
index e6460bc..fbe6f8f 100644
--- a/enterprise/Dockerfile
+++ b/enterprise/Dockerfile
@@ -13,7 +13,7 @@
 # imports existed; the repo-root context below is the same shape
 # enterprise-api's and enterprise-ingest's Dockerfiles already use for
 # the identical reason.
-#   docker build -f enterprise/Dockerfile -t sentry-enterprise-auth .
+#   docker build -f enterprise/Dockerfile -t cairnobs-enterprise-auth .
 FROM golang:1.25-alpine AS builder
 WORKDIR /src
 COPY . .
diff --git a/enterprise/README.md b/enterprise/README.md
index 5a72c1a..dda0972 100644
--- a/enterprise/README.md
+++ b/enterprise/README.md
@@ -40,7 +40,7 @@ section for exactly what "not yet run" means here and why. Don't read
 - `/alerting`'s `queryclient` presents a `RoleService` Bearer token
   (`API_SERVICE_TOKEN`) when configured -- see
   `/docs/phase-4-isolation-design.md`'s `alerting`↔`api` gap.
-- `sentryctl` presents `$SENTRYCTL_TOKEN` as a Bearer credential on every
+- `cairnobsctl` presents `$CAIRNOBSCTL_TOKEN` as a Bearer credential on every
   request when set.
 - `internal/rbacstore`: full CRUD over `users`/`tenants`/
   `tenant_memberships`/`data_sources` (`metadata/migrations/0017-0032`).
@@ -155,7 +155,7 @@ issues a `session.Manager.IssuePendingLogin` token (a distinct Go/JWT
 type from a real session -- see that type's doc comment for a real bug
 this design caught in its own tests: a shared JSON key would have let a
 full session token double as a pending login) as a
-`sentry_pending_login` cookie (`Path=/auth`) and redirects to
+`cairnobs_pending_login` cookie (`Path=/auth`) and redirects to
 `SELECT_TENANT_REDIRECT_URL` (defaults to
 `{POST_LOGIN_REDIRECT_URL}/select-tenant`) instead of completing the
 login. From there:
@@ -204,7 +204,7 @@ below) and Tantivy (`/search/README.md`'s "Per-tenant indices" section
 -- needed no code in this module at all, since `search`'s
 `IndexRegistry` already lived in AGPL core); and deployment-topology
 routing (does traffic actually reach `enterprise-api` instead of
-`api`), now a single-flag choice in both `deploy/helm/sentry` and
+`api`), now a single-flag choice in both `deploy/helm/cairnobs` and
 `docker-compose.yml` (`enterprise.enabled` / `COMPOSE_PROFILES`), see
 CLAUDE.md.
 
@@ -285,7 +285,7 @@ for both directions is the simpler, still-correctly-scoped choice).
 A real multi-tenant deployment runs `ingest -mode=server` (agent-facing,
 tags records, unchanged) alongside `enterprise-ingest` (consumer,
 per-tenant writes) *instead of* `ingest -mode=consumer` -- see `deploy/
-helm/sentry`'s `ingest.requireTenantCredential` value (gates both the
+helm/cairnobs`'s `ingest.requireTenantCredential` value (gates both the
 credential-validation requirement and this mode split together, since
 write-routing is only meaningful once records actually carry a
 tenant_id to route on) and `docker-compose.yml`'s `enterprise-ingest`
@@ -318,7 +318,7 @@ internal/saml/            crewjam/saml wiring: SP setup, login redirect, respons
 internal/session/          issues/validates signed session + RoleService tokens
 internal/authhandler/       POST /internal/authorize, GET /auth/features
 internal/loginhandler/       GET /auth/oidc/{login,callback} + GET /auth/saml/login + POST /auth/saml/acs -- the human login flow
-internal/rbacstore/          users/tenants/tenant_memberships/data_sources/dashboard_permissions CRUD (pgx against sentry_metadata)
+internal/rbacstore/          users/tenants/tenant_memberships/data_sources/dashboard_permissions CRUD (pgx against cairnobs_metadata)
 internal/tenantprovision/     real ClickHouse CREATE DATABASE/USER/GRANT
 internal/tenantcrd/            syncs -provision-tenant's real result into deploy/operator's Tenant CRD (K8s dynamic client, no cluster needed to test)
 internal/chrunner/             tenant-scoped api/querylang/executor.SQLRunner
@@ -431,7 +431,7 @@ SEARCH_TOKEN=$(docker compose run --rm enterprise-auth -mint-service-token=searc
 ```
 
 ```sh
-docker build -f Dockerfile -t sentry-enterprise-auth .   # context is enterprise/, not the repo root
+docker build -f Dockerfile -t cairnobs-enterprise-auth .   # context is enterprise/, not the repo root
 ```
 
 ## Bootstrapping a tenant and its first human user
@@ -484,7 +484,7 @@ comment already worries about). Changing a non-Owner role is just
 re-running `-grant-membership-*` with a different
 `-grant-membership-role` (`SetMembership`'s upsert already supports
 it). `dashboard_permissions` grants have no `enterprise-auth` flag and
-don't need one -- `sentryctl dashboards permissions list|grant|revoke`
+don't need one -- `cairnobsctl dashboards permissions list|grant|revoke`
 covers them over the HTTP endpoints `api/dashboards`' handler already
 exposes (`PUT`/`DELETE /dashboards/{id}/permissions/{userId}`,
 `GET .../permissions`), see `/cli/README.md`.
@@ -514,8 +514,8 @@ curl -s http://localhost:8080/healthz
 `internal/tenantcrd` sync step is a documented no-op in this deployment
 shape, same as everywhere else this codebase has an "off unless
 configured" optional dependency. It only does anything in a real
-cluster with `deploy/helm/sentry`'s `tenantOperator.enabled=true` -- see
-`/deploy/helm/sentry/README.md`'s "Trying the two-tenant example."
+cluster with `deploy/helm/cairnobs`'s `tenantOperator.enabled=true` -- see
+`/deploy/helm/cairnobs/README.md`'s "Trying the two-tenant example."
 
 `-provision-tenant` creates the tenant/data_source rows in rbacstore if
 they don't exist, provisions ClickHouse, persists the credentials, and
@@ -529,8 +529,8 @@ to, see `tenantprovision.ProvisionClickHouse`'s doc comment).
 |---|---|
 | `HTTP_LISTEN_ADDR` | `:8082` |
 | `POSTGRES_ADDR` | `localhost:5432` |
-| `POSTGRES_DATABASE` | `sentry_metadata` |
-| `POSTGRES_USERNAME` | `sentry` |
+| `POSTGRES_DATABASE` | `cairnobs_metadata` |
+| `POSTGRES_USERNAME` | `cairnobs` |
 | `POSTGRES_PASSWORD` | (empty) |
 | `OIDC_ISSUER_URL` | (empty — OIDC discovery skipped if unset) |
 | `OIDC_CLIENT_ID` | (empty) |
@@ -554,8 +554,8 @@ to, see `tenantprovision.ProvisionClickHouse`'s doc comment).
 | `CLICKHOUSE_ADMIN_PASSWORD` | (empty) |
 | `SEARCH_GRPC_ADDR` | `localhost:50052` |
 | `POSTGRES_ADDR` | `localhost:5432` |
-| `POSTGRES_DATABASE` | `sentry_metadata` |
-| `POSTGRES_USERNAME` | `sentry` |
+| `POSTGRES_DATABASE` | `cairnobs_metadata` |
+| `POSTGRES_USERNAME` | `cairnobs` |
 | `POSTGRES_PASSWORD` | (empty) |
 | `AUDIT_WRITER_USERNAME` | `audit_writer` |
 | `AUDIT_WRITER_PASSWORD` | (empty) |
diff --git a/enterprise/cmd/enterprise-api/Dockerfile b/enterprise/cmd/enterprise-api/Dockerfile
index c4f58dc..de3ae0a 100644
--- a/enterprise/cmd/enterprise-api/Dockerfile
+++ b/enterprise/cmd/enterprise-api/Dockerfile
@@ -1,7 +1,7 @@
 # Same shape as every other Go service's Dockerfile in this repo --
 # context must be the repo root (needs both enterprise/ and proto/, like
 # api/Dockerfile does for api/ + proto/), not enterprise/ alone.
-#   docker build -f enterprise/cmd/enterprise-api/Dockerfile -t sentry-enterprise-api .
+#   docker build -f enterprise/cmd/enterprise-api/Dockerfile -t cairnobs-enterprise-api .
 FROM golang:1.25-alpine AS builder
 WORKDIR /src
 COPY . .
diff --git a/enterprise/cmd/enterprise-api/main.go b/enterprise/cmd/enterprise-api/main.go
index c1e3a75..4aae840 100644
--- a/enterprise/cmd/enterprise-api/main.go
+++ b/enterprise/cmd/enterprise-api/main.go
@@ -17,7 +17,7 @@
 // keeps running plain api/cmd/api, unchanged; a real multi-tenant
 // deployment runs this one instead.
 //
-// Both Helm (deploy/helm/sentry/templates/api.yaml vs
+// Both Helm (deploy/helm/cairnobs/templates/api.yaml vs
 // enterprise-api.yaml) and docker-compose.yml (COMPOSE_PROFILES) now
 // make this the deployment-topology choice, not just a binary sitting
 // unused alongside api's -- see this repo's CLAUDE.md. `search`'s write
diff --git a/enterprise/cmd/enterprise-ingest/Dockerfile b/enterprise/cmd/enterprise-ingest/Dockerfile
index 352dba3..423d21b 100644
--- a/enterprise/cmd/enterprise-ingest/Dockerfile
+++ b/enterprise/cmd/enterprise-ingest/Dockerfile
@@ -2,7 +2,7 @@
 # context must be the repo root (needs ingest/, proto/, and enterprise/,
 # like enterprise-api/Dockerfile does for api/ + proto/ + enterprise/),
 # not enterprise/ alone.
-#   docker build -f enterprise/cmd/enterprise-ingest/Dockerfile -t sentry-enterprise-ingest .
+#   docker build -f enterprise/cmd/enterprise-ingest/Dockerfile -t cairnobs-enterprise-ingest .
 FROM golang:1.25-alpine AS builder
 WORKDIR /src
 COPY . .
diff --git a/enterprise/cmd/enterprise-ingest/main.go b/enterprise/cmd/enterprise-ingest/main.go
index 57c42b1..0bb5688 100644
--- a/enterprise/cmd/enterprise-ingest/main.go
+++ b/enterprise/cmd/enterprise-ingest/main.go
@@ -1,6 +1,6 @@
 // Command enterprise-ingest is the multi-tenant-aware alternative to
 // running `ingest -mode=consumer` -- reads the same shared
-// sentry.logs.raw Redpanda topic ingest/cmd/ingest's agent-facing
+// cairnobs.logs.raw Redpanda topic ingest/cmd/ingest's agent-facing
 // server half (PushBatch) produces onto (see that binary's doc
 // comment), but writes each record into its own tenant's dedicated
 // ClickHouse database (enterprise/internal/chwriter) instead of the one
@@ -21,7 +21,7 @@
 // alongside) `ingest -mode=consumer` -- `ingest -mode=server` (the
 // agent-facing half, which tags records with a tenant_id via
 // TenantResolver) keeps running unchanged and unconditionally either
-// way; only which process consumes sentry.logs.raw and where it writes
+// way; only which process consumes cairnobs.logs.raw and where it writes
 // changes.
 package main
 
diff --git a/enterprise/internal/apiconfig/apiconfig.go b/enterprise/internal/apiconfig/apiconfig.go
index 38c498f..78abbc1 100644
--- a/enterprise/internal/apiconfig/apiconfig.go
+++ b/enterprise/internal/apiconfig/apiconfig.go
@@ -125,8 +125,8 @@ func Load() (Config, error) {
 		},
 		Postgres: PostgresConfig{
 			Addr:     getenv("POSTGRES_ADDR", "localhost:5432"),
-			Database: getenv("POSTGRES_DATABASE", "sentry_metadata"),
-			Username: getenv("POSTGRES_USERNAME", "sentry"),
+			Database: getenv("POSTGRES_DATABASE", "cairnobs_metadata"),
+			Username: getenv("POSTGRES_USERNAME", "cairnobs"),
 			Password: getenv("POSTGRES_PASSWORD", ""),
 		},
 		AI: AIConfig{
diff --git a/enterprise/internal/audit/audit.go b/enterprise/internal/audit/audit.go
index 7e74629..fba3e46 100644
--- a/enterprise/internal/audit/audit.go
+++ b/enterprise/internal/audit/audit.go
@@ -3,11 +3,11 @@
 // section. Two independent defenses back the "no update/delete path
 // from the application layer" requirement -- both verified against a
 // live Postgres, not just written: audit_writer (this package's own
-// Postgres role, via its own connection pool, never the shared `sentry`
+// Postgres role, via its own connection pool, never the shared `cairnobs`
 // role every other store uses) has only INSERT+SELECT grants, and a
 // BEFORE UPDATE OR DELETE trigger (metadata/migrations/0015-0016)
 // rejects the operation for *any* role, including the table owner --
-// confirmed live: even `sentry` cannot UPDATE a row without first
+// confirmed live: even `cairnobs` cannot UPDATE a row without first
 // disabling the trigger, a privileged operation distinct from ordinary
 // application access.
 //
diff --git a/enterprise/internal/audit/integration_test.go b/enterprise/internal/audit/integration_test.go
index 7982d59..7d30315 100644
--- a/enterprise/internal/audit/integration_test.go
+++ b/enterprise/internal/audit/integration_test.go
@@ -34,7 +34,7 @@ func testPool(t *testing.T, user, password string) *pgxpool.Pool {
 	if addr == "" {
 		t.Skip("AUDIT_TEST_POSTGRES_ADDR not set -- skipping live-Postgres integration test")
 	}
-	dsn := fmt.Sprintf("postgres://%s:%s@%s/sentry_metadata", user, password, addr)
+	dsn := fmt.Sprintf("postgres://%s:%s@%s/cairnobs_metadata", user, password, addr)
 	pool, err := pgxpool.New(context.Background(), dsn)
 	if err != nil {
 		t.Fatalf("opening pool: %v", err)
@@ -65,7 +65,7 @@ func cleanupAuditLog(t *testing.T, adminPool *pgxpool.Pool) {
 
 func TestAppendAndVerifyChainRealPostgres(t *testing.T) {
 	writerPool := testPool(t, "audit_writer", os.Getenv("AUDIT_TEST_POSTGRES_PASSWORD"))
-	adminPool := testPool(t, "sentry", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
+	adminPool := testPool(t, "cairnobs", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
 	cleanupAuditLog(t, adminPool)
 	defer cleanupAuditLog(t, adminPool)
 
@@ -104,7 +104,7 @@ func TestAppendAndVerifyChainRealPostgres(t *testing.T) {
 // field on QueryAuditEntry -- matching that type's own doc comment.
 func TestQueryAPILoggerWritesAttributedToContextIdentity(t *testing.T) {
 	writerPool := testPool(t, "audit_writer", os.Getenv("AUDIT_TEST_POSTGRES_PASSWORD"))
-	adminPool := testPool(t, "sentry", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
+	adminPool := testPool(t, "cairnobs", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
 	cleanupAuditLog(t, adminPool)
 	defer cleanupAuditLog(t, adminPool)
 
@@ -131,7 +131,7 @@ func TestQueryAPILoggerWritesAttributedToContextIdentity(t *testing.T) {
 
 func TestQueryAPILoggerRefusesWithoutIdentity(t *testing.T) {
 	writerPool := testPool(t, "audit_writer", os.Getenv("AUDIT_TEST_POSTGRES_PASSWORD"))
-	adminPool := testPool(t, "sentry", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
+	adminPool := testPool(t, "cairnobs", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
 	cleanupAuditLog(t, adminPool)
 	defer cleanupAuditLog(t, adminPool)
 
@@ -149,7 +149,7 @@ func TestQueryAPILoggerRefusesWithoutIdentity(t *testing.T) {
 // confidence/accepted/edited fields that don't have dedicated columns.
 func TestAIInteractionLoggerWritesAttributedToContextIdentity(t *testing.T) {
 	writerPool := testPool(t, "audit_writer", os.Getenv("AUDIT_TEST_POSTGRES_PASSWORD"))
-	adminPool := testPool(t, "sentry", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
+	adminPool := testPool(t, "cairnobs", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
 	cleanupAuditLog(t, adminPool)
 	defer cleanupAuditLog(t, adminPool)
 
@@ -199,7 +199,7 @@ func TestAIInteractionLoggerWritesAttributedToContextIdentity(t *testing.T) {
 
 func TestAIInteractionLoggerRefusesWithoutIdentity(t *testing.T) {
 	writerPool := testPool(t, "audit_writer", os.Getenv("AUDIT_TEST_POSTGRES_PASSWORD"))
-	adminPool := testPool(t, "sentry", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
+	adminPool := testPool(t, "cairnobs", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
 	cleanupAuditLog(t, adminPool)
 	defer cleanupAuditLog(t, adminPool)
 
@@ -216,7 +216,7 @@ func TestAIInteractionLoggerRefusesWithoutIdentity(t *testing.T) {
 // would also pass.
 func TestVerifyChainDetectsTampering(t *testing.T) {
 	writerPool := testPool(t, "audit_writer", os.Getenv("AUDIT_TEST_POSTGRES_PASSWORD"))
-	adminPool := testPool(t, "sentry", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
+	adminPool := testPool(t, "cairnobs", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
 	cleanupAuditLog(t, adminPool)
 	defer cleanupAuditLog(t, adminPool)
 
@@ -270,7 +270,7 @@ func TestVerifyChainDetectsTampering(t *testing.T) {
 // unit test of the Go code alone.
 func TestAppendConcurrentWritesProduceAValidChain(t *testing.T) {
 	writerPool := testPool(t, "audit_writer", os.Getenv("AUDIT_TEST_POSTGRES_PASSWORD"))
-	adminPool := testPool(t, "sentry", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
+	adminPool := testPool(t, "cairnobs", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
 	cleanupAuditLog(t, adminPool)
 	defer cleanupAuditLog(t, adminPool)
 
@@ -316,7 +316,7 @@ func TestAppendConcurrentWritesProduceAValidChain(t *testing.T) {
 // the previous checkpoint's hash.
 func TestCheckpointerRun(t *testing.T) {
 	writerPool := testPool(t, "audit_writer", os.Getenv("AUDIT_TEST_POSTGRES_PASSWORD"))
-	adminPool := testPool(t, "sentry", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
+	adminPool := testPool(t, "cairnobs", os.Getenv("AUDIT_TEST_ADMIN_PASSWORD"))
 	cleanupAuditLog(t, adminPool)
 	defer cleanupAuditLog(t, adminPool)
 
diff --git a/enterprise/internal/chwriter/chwriter.go b/enterprise/internal/chwriter/chwriter.go
index 6678506..64cf706 100644
--- a/enterprise/internal/chwriter/chwriter.go
+++ b/enterprise/internal/chwriter/chwriter.go
@@ -16,7 +16,7 @@
 // chrunner.RunSQL resolves exactly one tenant per call from ctx (a
 // single request always belongs to one identity); WriteBatch resolves
 // per *record*, since one Kafka batch pulled off the shared
-// sentry.logs.raw topic can freely mix records from many different
+// cairnobs.logs.raw topic can freely mix records from many different
 // tenants -- see ingest/internal/grpcserver's doc comment for why
 // there's one shared topic, not topic-per-tenant.
 package chwriter
diff --git a/enterprise/internal/config/config.go b/enterprise/internal/config/config.go
index afe4ae1..b0a3cff 100644
--- a/enterprise/internal/config/config.go
+++ b/enterprise/internal/config/config.go
@@ -101,8 +101,8 @@ func Load() (Config, error) {
 		HTTPListenAddr: getenv("HTTP_LISTEN_ADDR", ":8082"),
 		Postgres: PostgresConfig{
 			Addr:     getenv("POSTGRES_ADDR", "localhost:5432"),
-			Database: getenv("POSTGRES_DATABASE", "sentry_metadata"),
-			Username: getenv("POSTGRES_USERNAME", "sentry"),
+			Database: getenv("POSTGRES_DATABASE", "cairnobs_metadata"),
+			Username: getenv("POSTGRES_USERNAME", "cairnobs"),
 			Password: getenv("POSTGRES_PASSWORD", ""),
 		},
 		OIDC: OIDCConfig{
diff --git a/enterprise/internal/ingestconfig/ingestconfig.go b/enterprise/internal/ingestconfig/ingestconfig.go
index 8bea8da..2c9a985 100644
--- a/enterprise/internal/ingestconfig/ingestconfig.go
+++ b/enterprise/internal/ingestconfig/ingestconfig.go
@@ -74,26 +74,26 @@ func Load() (Config, error) {
 		ClickHouseAddr: getenv("CLICKHOUSE_ADDR", "localhost:9000"),
 		Postgres: PostgresConfig{
 			Addr:     getenv("POSTGRES_ADDR", "localhost:5432"),
-			Database: getenv("POSTGRES_DATABASE", "sentry_metadata"),
-			Username: getenv("POSTGRES_USERNAME", "sentry"),
+			Database: getenv("POSTGRES_DATABASE", "cairnobs_metadata"),
+			Username: getenv("POSTGRES_USERNAME", "cairnobs"),
 			Password: getenv("POSTGRES_PASSWORD", ""),
 		},
 		Redpanda: RedpandaConfig{
 			Brokers: strings.Split(getenv("REDPANDA_BROKERS", "localhost:9092"), ","),
 			// Same default topic ingest/internal/config uses -- this
-			// binary reads the identical shared sentry.logs.raw topic
+			// binary reads the identical shared cairnobs.logs.raw topic
 			// ingest/cmd/ingest's server half (agent-facing PushBatch)
 			// produces onto; there's no per-tenant topic, see
 			// ingest/internal/grpcserver's doc comment.
-			Topic: getenv("REDPANDA_TOPIC", "sentry.logs.raw"),
+			Topic: getenv("REDPANDA_TOPIC", "cairnobs.logs.raw"),
 			// A distinct consumer group from ingest/cmd/ingest's own
-			// default ("sentry-ingest") -- this binary and a
+			// default ("cairnobs-ingest") -- this binary and a
 			// single-tenant `ingest -mode=consumer` must never share a
 			// group (each message would only ever reach one of them,
 			// silently splitting traffic) even though in practice a
 			// real multi-tenant deployment runs this binary *instead
 			// of*, not alongside, `ingest -mode=consumer`.
-			ConsumerGroup: getenv("REDPANDA_CONSUMER_GROUP", "sentry-enterprise-ingest"),
+			ConsumerGroup: getenv("REDPANDA_CONSUMER_GROUP", "cairnobs-enterprise-ingest"),
 		},
 	}
 
diff --git a/enterprise/internal/rbacstore/rbacstore.go b/enterprise/internal/rbacstore/rbacstore.go
index cac0747..01a5c0e 100644
--- a/enterprise/internal/rbacstore/rbacstore.go
+++ b/enterprise/internal/rbacstore/rbacstore.go
@@ -2,7 +2,7 @@
 // role schema (metadata/migrations/0017-0021) described in
 // /docs/phase-4-rbac-design.md: users (global SSO identity), tenants,
 // and tenant_memberships (per-tenant role). It uses the same shared
-// "sentry" Postgres role/pool every other metadata store does (unlike
+// "cairnobs" Postgres role/pool every other metadata store does (unlike
 // enterprise/internal/audit's deliberately separate, narrower-granted
 // pool) -- ordinary read/write CRUD on control-plane config, not an
 // append-only ledger, so it has no analogous reason to restrict its own
diff --git a/enterprise/internal/rbacstore/rbacstore_test.go b/enterprise/internal/rbacstore/rbacstore_test.go
index 84a49d9..00061a5 100644
--- a/enterprise/internal/rbacstore/rbacstore_test.go
+++ b/enterprise/internal/rbacstore/rbacstore_test.go
@@ -29,7 +29,7 @@ func testStore(t *testing.T) *Store {
 		t.Skip("RBACSTORE_TEST_POSTGRES_ADDR not set -- skipping live-Postgres integration test")
 	}
 	password := os.Getenv("RBACSTORE_TEST_POSTGRES_PASSWORD")
-	dsn := fmt.Sprintf("postgres://sentry:%s@%s/sentry_metadata", password, addr)
+	dsn := fmt.Sprintf("postgres://cairnobs:%s@%s/cairnobs_metadata", password, addr)
 	pool, err := pgxpool.New(context.Background(), dsn)
 	if err != nil {
 		t.Fatalf("opening pool: %v", err)
diff --git a/enterprise/internal/saml/saml_test.go b/enterprise/internal/saml/saml_test.go
index cd22304..caf7738 100644
--- a/enterprise/internal/saml/saml_test.go
+++ b/enterprise/internal/saml/saml_test.go
@@ -27,7 +27,7 @@ func TestNewRejectsMissingConfig(t *testing.T) {
 }
 
 func TestNewRejectsMissingIDPMetadata(t *testing.T) {
-	_, err := New(Config{EntityID: "https://sentry.example.com/saml/metadata", ACSURL: "https://sentry.example.com/saml/acs"})
+	_, err := New(Config{EntityID: "https://cairnobs.example.com/saml/metadata", ACSURL: "https://cairnobs.example.com/saml/acs"})
 	if err == nil {
 		t.Fatalf("expected an error when IDPMetadata is missing")
 	}
@@ -40,8 +40,8 @@ func TestNewRejectsMissingIDPMetadata(t *testing.T) {
 // redirect rather than just "the code compiles."
 func TestLoginURLBuildsAgainstRealIDPMetadata(t *testing.T) {
 	sp, err := New(Config{
-		EntityID:    "https://sentry.example.com/saml/metadata",
-		ACSURL:      "https://sentry.example.com/saml/acs",
+		EntityID:    "https://cairnobs.example.com/saml/metadata",
+		ACSURL:      "https://cairnobs.example.com/saml/acs",
 		IDPMetadata: fakeIDPMetadata(),
 	})
 	if err != nil {
diff --git a/hack/alert-load-test/README.md b/hack/alert-load-test/README.md
index a709914..f6c798d 100644
--- a/hack/alert-load-test/README.md
+++ b/hack/alert-load-test/README.md
@@ -14,7 +14,7 @@ go run . --count 500000
 
 # 2. Run a webhook-sink so the (never-firing, by design) rules have a
 #    valid notification target to point at:
-docker run -d --name sentry-webhook-sink --network sentry_default \
+docker run -d --name cairnobs-webhook-sink --network sentry_default \
   -p 9099:9099 -v $(pwd)/../webhook-sink:/src -w /src golang:1.25-alpine go run .
 
 # 3. Run the load test:
diff --git a/hack/alert-load-test/main.go b/hack/alert-load-test/main.go
index 5b847c0..863fcdd 100644
--- a/hack/alert-load-test/main.go
+++ b/hack/alert-load-test/main.go
@@ -43,7 +43,7 @@ var (
 	pollInterval = flag.Duration("poll-interval", 5*time.Second, "how often to poll GET /rules while observing")
 	concurrency  = flag.Int("concurrency", 20, "concurrent rule-creation requests")
 	skipCleanup  = flag.Bool("no-cleanup", false, "leave the seeded rules/target in place after the run")
-	webhookURL   = flag.String("webhook-url", "http://sentry-webhook-sink:9099/", "notification target URL -- default assumes a webhook-sink container reachable on the compose network")
+	webhookURL   = flag.String("webhook-url", "http://cairnobs-webhook-sink:9099/", "notification target URL -- default assumes a webhook-sink container reachable on the compose network")
 )
 
 func main() {
diff --git a/ingest/Dockerfile b/ingest/Dockerfile
index 9612b39..2d76bef 100644
--- a/ingest/Dockerfile
+++ b/ingest/Dockerfile
@@ -1,6 +1,6 @@
 # Build context must be the repo root (sentry/), not ingest/, since this
 # needs both ingest/ and proto/:
-#   docker build -f ingest/Dockerfile -t sentry-ingest .
+#   docker build -f ingest/Dockerfile -t cairnobs-ingest .
 
 FROM golang:1.25-alpine AS builder
 WORKDIR /src
diff --git a/ingest/README.md b/ingest/README.md
index 914c09e..edaf1e4 100644
--- a/ingest/README.md
+++ b/ingest/README.md
@@ -86,13 +86,13 @@ full list and defaults) — no config file format for Phase 0:
 | Var | Default | Purpose |
 |---|---|---|
 | `GRPC_LISTEN_ADDR` | `:4317` | Agent-facing gRPC listen address |
-| `TLS_CERT_FILE` / `TLS_KEY_FILE` | `/etc/sentry-ingest/server{,-key}.pem` | ingest's own mTLS identity |
-| `TLS_CLIENT_CA_FILE` | `/etc/sentry-ingest/ca.pem` | CA used to verify agent client certs |
+| `TLS_CERT_FILE` / `TLS_KEY_FILE` | `/etc/cairnobs-ingest/server{,-key}.pem` | ingest's own mTLS identity |
+| `TLS_CLIENT_CA_FILE` | `/etc/cairnobs-ingest/ca.pem` | CA used to verify agent client certs |
 | `REDPANDA_BROKERS` | `localhost:9092` | Comma-separated broker list |
-| `REDPANDA_TOPIC` | `sentry.logs.raw` | Must match the topic provisioned in `/transport` |
-| `REDPANDA_CONSUMER_GROUP` | `sentry-ingest` | Consumer group id |
+| `REDPANDA_TOPIC` | `cairnobs.logs.raw` | Must match the topic provisioned in `/transport` |
+| `REDPANDA_CONSUMER_GROUP` | `cairnobs-ingest` | Consumer group id |
 | `CLICKHOUSE_ADDR` | `localhost:9000` | Native protocol port, not HTTP |
-| `CLICKHOUSE_DATABASE` / `_USERNAME` / `_PASSWORD` | `sentry` / `default` / `` | |
+| `CLICKHOUSE_DATABASE` / `_USERNAME` / `_PASSWORD` | `cairnobs` / `default` / `` | |
 | `CONSUMER_BATCH_MAX_SIZE` | `500` | Records per ClickHouse batch insert |
 | `CONSUMER_BATCH_FLUSH_INTERVAL_MS` | `2000` | Max time a partial batch waits before flushing |
 | `ENTERPRISE_AUTH_URL` | (empty) | Enables `internal/grpcserver.TenantResolver` -- empty means PushBatch never requires a bearer credential and no `tenant_id` header is ever attached, same as every Phase 0-3 deployment |
@@ -108,12 +108,12 @@ go test ./...
 Requires `google.golang.org/protobuf/cmd/protoc-gen-go` and
 `google.golang.org/grpc/cmd/protoc-gen-go-grpc` only if you're
 regenerating `/proto`'s Go bindings — ingest itself just imports the
-already-generated `github.com/sentry/sentry/proto` module (see the
+already-generated `github.com/cairnobs/cairnobs/proto` module (see the
 `replace` directive in `go.mod`, pointing at `../proto`).
 
 ```sh
 # from the repo root, not ingest/
-docker build -f ingest/Dockerfile -t sentry-ingest .
+docker build -f ingest/Dockerfile -t cairnobs-ingest .
 ```
 
 ## Testing notes
diff --git a/ingest/internal/agentregistry/agentregistry.go b/ingest/internal/agentregistry/agentregistry.go
index cba25da..392f4cc 100644
--- a/ingest/internal/agentregistry/agentregistry.go
+++ b/ingest/internal/agentregistry/agentregistry.go
@@ -1,7 +1,7 @@
 // Package agentregistry is the Postgres-backed implementation of
 // grpcserver.AgentRegistry -- ingest's half of agent inventory/remote
 // config (see /docs/agent-management-design.md). Writes into the same
-// sentry_metadata Postgres api reads/writes from for the web UI's
+// cairnobs_metadata Postgres api reads/writes from for the web UI's
 // inventory and edit-config views (api/agents), the same shared-schema-
 // different-services shape alerting and api already use for dashboards/
 // alert_rules.
diff --git a/ingest/internal/config/config.go b/ingest/internal/config/config.go
index b52ee27..bd205d7 100644
--- a/ingest/internal/config/config.go
+++ b/ingest/internal/config/config.go
@@ -26,8 +26,8 @@ type Config struct {
 	// AgentRegistry enables agent inventory/remote config
 	// (internal/agentregistry, internal/grpcserver.AgentRegistry) when
 	// Postgres.Addr is set -- same "off unless configured" shape as
-	// EnterpriseAuthURL above. Writes into the same sentry_metadata
-	// database api/web already use, via the same shared "sentry" role
+	// EnterpriseAuthURL above. Writes into the same cairnobs_metadata
+	// database api/web already use, via the same shared "cairnobs" role
 	// every other non-audit table in this schema uses (unlike
 	// audit_log's dedicated restricted role -- agent inventory carries
 	// no tamper-evidence requirement).
@@ -110,12 +110,12 @@ func Load() (Config, error) {
 		},
 		Redpanda: RedpandaConfig{
 			Brokers:       strings.Split(getenv("REDPANDA_BROKERS", "localhost:9092"), ","),
-			Topic:         getenv("REDPANDA_TOPIC", "sentry.logs.raw"),
-			ConsumerGroup: getenv("REDPANDA_CONSUMER_GROUP", "sentry-ingest"),
+			Topic:         getenv("REDPANDA_TOPIC", "cairnobs.logs.raw"),
+			ConsumerGroup: getenv("REDPANDA_CONSUMER_GROUP", "cairnobs-ingest"),
 		},
 		ClickHouse: ClickHouseConfig{
 			Addr:     getenv("CLICKHOUSE_ADDR", "localhost:9000"),
-			Database: getenv("CLICKHOUSE_DATABASE", "sentry"),
+			Database: getenv("CLICKHOUSE_DATABASE", "cairnobs"),
 			Username: getenv("CLICKHOUSE_USERNAME", "default"),
 			Password: getenv("CLICKHOUSE_PASSWORD", ""),
 		},
@@ -123,8 +123,8 @@ func Load() (Config, error) {
 		AgentRegistry: AgentRegistryConfig{
 			Postgres: PostgresConfig{
 				Addr:     getenv("AGENT_REGISTRY_POSTGRES_ADDR", ""),
-				Database: getenv("AGENT_REGISTRY_POSTGRES_DATABASE", "sentry_metadata"),
-				Username: getenv("AGENT_REGISTRY_POSTGRES_USERNAME", "sentry"),
+				Database: getenv("AGENT_REGISTRY_POSTGRES_DATABASE", "cairnobs_metadata"),
+				Username: getenv("AGENT_REGISTRY_POSTGRES_USERNAME", "cairnobs"),
 				Password: getenv("AGENT_REGISTRY_POSTGRES_PASSWORD", ""),
 			},
 		},
diff --git a/ingest/internal/config/config_test.go b/ingest/internal/config/config_test.go
index 63a6f2c..d54f8f6 100644
--- a/ingest/internal/config/config_test.go
+++ b/ingest/internal/config/config_test.go
@@ -10,8 +10,8 @@ func TestLoadDefaults(t *testing.T) {
 	if cfg.GRPC.ListenAddr != ":4317" {
 		t.Errorf("GRPC.ListenAddr = %q, want :4317", cfg.GRPC.ListenAddr)
 	}
-	if cfg.Redpanda.Topic != "sentry.logs.raw" {
-		t.Errorf("Redpanda.Topic = %q, want sentry.logs.raw", cfg.Redpanda.Topic)
+	if cfg.Redpanda.Topic != "cairnobs.logs.raw" {
+		t.Errorf("Redpanda.Topic = %q, want cairnobs.logs.raw", cfg.Redpanda.Topic)
 	}
 	if cfg.Batch.MaxSize != 500 {
 		t.Errorf("Batch.MaxSize = %d, want 500", cfg.Batch.MaxSize)
diff --git a/metadata/Dockerfile b/metadata/Dockerfile
index d6be65a..461e208 100644
--- a/metadata/Dockerfile
+++ b/metadata/Dockerfile
@@ -1,6 +1,6 @@
 # One-shot migration runner: bash + psql client baked in, migrations/*.sql
 # copied in at build time. Mirrors /storage/Dockerfile's shape.
-#   docker build -f metadata/Dockerfile -t sentry-metadata-migrate metadata/
+#   docker build -f metadata/Dockerfile -t cairnobs-metadata-migrate metadata/
 FROM alpine:3.20
 RUN apk add --no-cache bash postgresql16-client
 WORKDIR /metadata
diff --git a/metadata/README.md b/metadata/README.md
index 2a727cd..6ddff1c 100644
--- a/metadata/README.md
+++ b/metadata/README.md
@@ -11,14 +11,14 @@ doesn't provide.
 
 ## Schema
 
-Seven tables across three features, one shared database (`sentry_metadata`):
+Seven tables across three features, one shared database (`cairnobs_metadata`):
 
 - `dashboards`, `dashboard_panels` — owned by `/api` (`api/internal/dashboards`)
 - `notification_targets`, `alert_rules`, `alert_state`, `delivery_log` —
   owned by `/alerting`
 - `audit_log` — owned by `enterprise/internal/audit` (Phase 4). Unlike
   every other table here, this one is **not** written through the shared
-  `sentry` role/pool — see "The `audit_writer` role" below.
+  `cairnobs` role/pool — see "The `audit_writer` role" below.
 
 "Owned" here is a documentation convention, not a technical boundary —
 both services connect to the same Postgres instance/database, each with
@@ -39,13 +39,13 @@ written:
    with **only** `INSERT`/`SELECT` grants on `audit_log` — no
    `UPDATE`/`DELETE`/`TRUNCATE`, ever. `enterprise/internal/audit.Store`
    connects using this role's credentials via its **own** `pgxpool.Pool`,
-   never the shared `sentry` pool `api`/`alerting`'s other stores use —
+   never the shared `cairnobs` pool `api`/`alerting`'s other stores use —
    reusing the shared pool for audit writes would give audit_log's
    application-level credential the same `UPDATE`/`DELETE` grants every
    other metadata table has, silently defeating the whole point.
 2. A `BEFORE UPDATE OR DELETE` trigger (`migrations/0015`-`0016`) that
    rejects the operation for **any** role, including the table owner
-   (`sentry`) — confirmed live: even `sentry` needs to explicitly
+   (`cairnobs`) — confirmed live: even `cairnobs` needs to explicitly
    `ALTER TABLE audit_log DISABLE TRIGGER audit_log_immutable` (a
    privileged, distinct-from-normal-access operation) before it can
    modify a row. This is redundant defense-in-depth independent of the
@@ -89,9 +89,9 @@ Environment variables `migrate.sh` reads (all optional except
 |---|---|
 | `POSTGRES_HOST` | `localhost` |
 | `POSTGRES_PORT` | `5432` |
-| `POSTGRES_USER` | `sentry` |
+| `POSTGRES_USER` | `cairnobs` |
 | `POSTGRES_PASSWORD` | (empty — must be set) |
-| `POSTGRES_DATABASE` | `sentry_metadata` |
+| `POSTGRES_DATABASE` | `cairnobs_metadata` |
 | `AUDIT_WRITER_PASSWORD` | `audit-writer-dev-only` |
 
 The database itself isn't created by `migrate.sh` — the `postgres:16-alpine`
diff --git a/metadata/docker-compose.yml b/metadata/docker-compose.yml
index 52eae6a..15c27e6 100644
--- a/metadata/docker-compose.yml
+++ b/metadata/docker-compose.yml
@@ -9,8 +9,8 @@ services:
     ports:
       - "5432:5432"
     environment:
-      POSTGRES_DB: sentry_metadata
-      POSTGRES_USER: sentry
+      POSTGRES_DB: cairnobs_metadata
+      POSTGRES_USER: cairnobs
       POSTGRES_PASSWORD: "cairnobs-dev-only" # not a real secret, see root docker-compose.yml
     volumes:
       - metadata-postgres-data:/var/lib/postgresql/data
diff --git a/metadata/migrate.sh b/metadata/migrate.sh
index 93b8d09..6a40529 100644
--- a/metadata/migrate.sh
+++ b/metadata/migrate.sh
@@ -8,9 +8,9 @@ set -euo pipefail
 
 POSTGRES_HOST="${POSTGRES_HOST:-localhost}"
 POSTGRES_PORT="${POSTGRES_PORT:-5432}"
-POSTGRES_USER="${POSTGRES_USER:-sentry}"
+POSTGRES_USER="${POSTGRES_USER:-cairnobs}"
 POSTGRES_PASSWORD="${POSTGRES_PASSWORD:-}"
-POSTGRES_DATABASE="${POSTGRES_DATABASE:-sentry_metadata}"
+POSTGRES_DATABASE="${POSTGRES_DATABASE:-cairnobs_metadata}"
 # Password for the restricted audit-log-writer Postgres role (Phase 4
 # task 4, see /docs/phase-4-isolation-design.md's audit logging
 # section) -- a second, narrower-granted role, not the shared
diff --git a/search/README.md b/search/README.md
index 59d949d..cb59f5e 100644
--- a/search/README.md
+++ b/search/README.md
@@ -18,7 +18,7 @@ planning.
 ## How it fits together
 
 ```
-ingest (gRPC front end) --> Redpanda (sentry.logs.raw) --> ingest's ClickHouse-writer consumer --> ClickHouse
+ingest (gRPC front end) --> Redpanda (cairnobs.logs.raw) --> ingest's ClickHouse-writer consumer --> ClickHouse
                                     \
                                      `--> search's own consumer --> Tantivy index
 ```
@@ -121,7 +121,7 @@ Environment variables (see `src/config.rs`):
 |---|---|---|
 | `GRPC_LISTEN_ADDR` | `0.0.0.0:50052` | Full socket address — Rust's parser needs one, unlike Go's `:PORT` shorthand `ingest`/`api` use |
 | `REDPANDA_BROKERS` | `localhost:9092` | Comma-separated broker list |
-| `REDPANDA_TOPIC` | `sentry.logs.raw` | Must match `/ingest`'s topic |
+| `REDPANDA_TOPIC` | `cairnobs.logs.raw` | Must match `/ingest`'s topic |
 | `REDPANDA_TOPIC_PARTITIONS` | `6` | Must match what `/transport/provision-topics.sh` created |
 | `INDEX_PATH` | `/var/lib/cairnobs-search/index` | Default (non-tenant) Tantivy index directory |
 | `TENANTS_INDEX_PATH` | `/var/lib/cairnobs-search/tenants` | Per-tenant index directories live under here, one subdirectory per tenant_id (Phase 4) |
diff --git a/search/src/config.rs b/search/src/config.rs
index f6f9487..70af6e4 100644
--- a/search/src/config.rs
+++ b/search/src/config.rs
@@ -67,7 +67,7 @@ impl Config {
                 .split(',')
                 .map(str::to_string)
                 .collect(),
-            redpanda_topic: getenv("REDPANDA_TOPIC", "sentry.logs.raw"),
+            redpanda_topic: getenv("REDPANDA_TOPIC", "cairnobs.logs.raw"),
             index_path: PathBuf::from(getenv("INDEX_PATH", "/var/lib/cairnobs-search/index")),
             offsets_path: PathBuf::from(getenv(
                 "OFFSETS_PATH",
diff --git a/search/src/consumer.rs b/search/src/consumer.rs
index 29fe122..56c6814 100644
--- a/search/src/consumer.rs
+++ b/search/src/consumer.rs
@@ -23,7 +23,7 @@ use crate::tenants::ActiveTenantTracker;
 /// `TestTenantIDHeaderKeyConstantsMatch` does on the Go side.
 const TENANT_ID_HEADER_KEY: &str = "tenant_id";
 
-/// Reads the same `sentry.logs.raw` topic ingest's ClickHouse-writer
+/// Reads the same `cairnobs.logs.raw` topic ingest's ClickHouse-writer
 /// consumer reads, as an independent consumer group in spirit (its own
 /// offset tracking, own failure domain) even though rskafka doesn't speak
 /// Kafka's broker-side consumer-group protocol -- see offsets.rs. One
diff --git a/storage/Dockerfile b/storage/Dockerfile
index 1dbfde2..71cf257 100644
--- a/storage/Dockerfile
+++ b/storage/Dockerfile
@@ -1,7 +1,7 @@
 # One-shot migration runner: bash + curl baked in, migrations/*.sql copied
 # in at build time. No runtime package install and no host volume mount
 # needed — works offline once built.
-#   docker build -f storage/Dockerfile -t sentry-clickhouse-migrate storage/
+#   docker build -f storage/Dockerfile -t cairnobs-clickhouse-migrate storage/
 FROM alpine:3.20
 RUN apk add --no-cache bash curl
 WORKDIR /storage
diff --git a/storage/README.md b/storage/README.md
index 9bea3bc..4b8030a 100644
--- a/storage/README.md
+++ b/storage/README.md
@@ -100,7 +100,7 @@ defaults so the two stay in sync out of the box):
 | `CLICKHOUSE_HTTP` | `http://localhost:8123` |
 | `CLICKHOUSE_USER` | `default` |
 | `CLICKHOUSE_PASSWORD` | (empty — override, see above) |
-| `CLICKHOUSE_DATABASE` | `sentry` |
+| `CLICKHOUSE_DATABASE` | `cairnobs` |
 
 There's also a `Dockerfile` (bash + curl baked in, `migrations/` copied in
 at build time) used by the root-level `docker-compose.yml` as a one-shot
diff --git a/storage/migrate.sh b/storage/migrate.sh
index 155071f..cf601e3 100755
--- a/storage/migrate.sh
+++ b/storage/migrate.sh
@@ -13,7 +13,7 @@ set -euo pipefail
 CLICKHOUSE_HTTP="${CLICKHOUSE_HTTP:-http://localhost:8123}"
 CLICKHOUSE_USER="${CLICKHOUSE_USER:-default}"
 CLICKHOUSE_PASSWORD="${CLICKHOUSE_PASSWORD:-}"
-DATABASE="${CLICKHOUSE_DATABASE:-sentry}"
+DATABASE="${CLICKHOUSE_DATABASE:-cairnobs}"
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 MIGRATIONS_DIR="${SCRIPT_DIR}/migrations"
diff --git a/transport/README.md b/transport/README.md
index 830fb15..36d192a 100644
--- a/transport/README.md
+++ b/transport/README.md
@@ -5,7 +5,7 @@ Redpanda for local development, plus the script that provisions the topic
 
 ## Topic naming contract
 
-`ingest` defaults to `REDPANDA_TOPIC=sentry.logs.raw` (see
+`ingest` defaults to `REDPANDA_TOPIC=cairnobs.logs.raw` (see
 `/ingest/internal/config`). `provision-topics.sh` defaults to the same
 name. These aren't wired together automatically — if you change one,
 change the other, or override `REDPANDA_TOPIC` consistently wherever
diff --git a/transport/provision-topics.sh b/transport/provision-topics.sh
index a7910c8..18f816e 100755
--- a/transport/provision-topics.sh
+++ b/transport/provision-topics.sh
@@ -17,7 +17,7 @@ set -euo pipefail
 # of ever becoming healthy.
 BROKERS="${REDPANDA_BROKERS:-localhost:9092}"
 ADMIN_HOSTS="${REDPANDA_ADMIN_HOSTS:-localhost:9644}"
-TOPIC="${REDPANDA_TOPIC:-sentry.logs.raw}"
+TOPIC="${REDPANDA_TOPIC:-cairnobs.logs.raw}"
 PARTITIONS="${REDPANDA_TOPIC_PARTITIONS:-6}"
 
 echo "Waiting for Redpanda admin API at ${ADMIN_HOSTS}..."
diff --git a/web/src/lib/assets/favicon.svg b/web/src/lib/assets/favicon.svg
index 2f6a1e8..4462b29 100644
--- a/web/src/lib/assets/favicon.svg
+++ b/web/src/lib/assets/favicon.svg
@@ -2,8 +2,8 @@
   <!-- Favicon: simplified 3-stone mark on terminal-dark rounded square -->
   <rect x="0" y="0" width="64" height="64" rx="14" fill="#0D1117"/>
   <g>
-    <rect x="12" y="38" width="40" height="13" rx="6.5" fill="#FF8A00" transform="rotate(-2 32 44.5)"/>
-    <rect x="18" y="24" width="28" height="12" rx="6" fill="#FF9D2E" transform="rotate(3 32 30)"/>
-    <rect x="23" y="12" width="18" height="10" rx="5" fill="#FFB157" transform="rotate(-3 32 17)"/>
+    <path d="M14,50 L10,45 L13,40 L22,37 L34,40 L44,37 L53,41 L50,47 L40,51 L26,48 Z" fill="#FF8A00"/>
+    <path d="M20,35 L16,30 L19,25 L28,23 L36,26 L44,23 L47,28 L43,34 L32,36 L24,33 Z" fill="#FF9D2E"/>
+    <path d="M24,21 L21,16 L25,12 L32,11 L38,13 L41,17 L38,21 L31,22 L27,20 Z" fill="#FFB157"/>
   </g>
 </svg>
diff --git a/web/src/lib/assets/logo-horizontal-dark.svg b/web/src/lib/assets/logo-horizontal-dark.svg
index f822879..0fa3526 100644
--- a/web/src/lib/assets/logo-horizontal-dark.svg
+++ b/web/src/lib/assets/logo-horizontal-dark.svg
@@ -1,10 +1,10 @@
 <svg width="600" height="140" viewBox="0 0 600 140" xmlns="http://www.w3.org/2000/svg">
   <!-- Horizontal lockup for dark backgrounds -->
   <g transform="translate(20,10) scale(0.6)">
-    <rect x="30" y="142" width="140" height="42" rx="20" fill="#E6690E" transform="rotate(-1.5 100 163)"/>
-    <rect x="48" y="106" width="104" height="38" rx="18" fill="#FF8A00" transform="rotate(2.5 100 125)"/>
-    <rect x="64" y="73" width="72" height="34" rx="16" fill="#FF9D2E" transform="rotate(-3 100 90)"/>
-    <rect x="78" y="43" width="44" height="30" rx="14" fill="#FFB157" transform="rotate(3.5 100 58)"/>
+    <path d="M32,184 L20,172 L26,155 L18,146 L46,138 L82,144 L112,134 L150,140 L176,150 L182,168 L170,184 L142,192 L100,182 L64,190 Z" fill="#E6690E"/>
+    <path d="M54,144 L42,134 L50,118 L44,108 L68,100 L96,106 L118,98 L142,106 L156,116 L150,132 L160,142 L132,150 L100,140 L70,148 Z" fill="#FF8A00"/>
+    <path d="M68,106 L58,96 L64,82 L60,72 L80,66 L100,72 L116,64 L132,74 L138,86 L130,98 L138,106 L112,112 L88,104 L72,110 Z" fill="#FF9D2E"/>
+    <path d="M80,70 L72,60 L78,48 L74,40 L92,36 L106,42 L116,34 L126,44 L124,56 L130,66 L108,72 L92,64 L82,70 Z" fill="#FFB157"/>
   </g>
   <text x="160" y="87" font-family="'JetBrains Mono','Fira Code',ui-monospace,monospace" font-size="48" font-weight="700" fill="#F2F2F2" letter-spacing="-1">cairn</text>
   <text x="342" y="87" font-family="'JetBrains Mono','Fira Code',ui-monospace,monospace" font-size="48" font-weight="700" fill="#FF8A00" letter-spacing="1"> obs</text>
diff --git a/web/src/lib/assets/logo-horizontal-light.svg b/web/src/lib/assets/logo-horizontal-light.svg
new file mode 100644
index 0000000..8dcd73a
--- /dev/null
+++ b/web/src/lib/assets/logo-horizontal-light.svg
@@ -0,0 +1,12 @@
+<svg width="600" height="140" viewBox="0 0 600 140" xmlns="http://www.w3.org/2000/svg">
+  <!-- Horizontal lockup for light backgrounds -->
+  <g transform="translate(20,10) scale(0.6)">
+    <path d="M32,184 L20,172 L26,155 L18,146 L46,138 L82,144 L112,134 L150,140 L176,150 L182,168 L170,184 L142,192 L100,182 L64,190 Z" fill="#E6690E"/>
+    <path d="M54,144 L42,134 L50,118 L44,108 L68,100 L96,106 L118,98 L142,106 L156,116 L150,132 L160,142 L132,150 L100,140 L70,148 Z" fill="#FF8A00"/>
+    <path d="M68,106 L58,96 L64,82 L60,72 L80,66 L100,72 L116,64 L132,74 L138,86 L130,98 L138,106 L112,112 L88,104 L72,110 Z" fill="#FF9D2E"/>
+    <path d="M80,70 L72,60 L78,48 L74,40 L92,36 L106,42 L116,34 L126,44 L124,56 L130,66 L108,72 L92,64 L82,70 Z" fill="#FFB157"/>
+  </g>
+  <text x="160" y="87" font-family="'JetBrains Mono','Fira Code',ui-monospace,monospace" font-size="48" font-weight="700" fill="#111315" letter-spacing="-1">cairn</text>
+  <text x="342" y="87" font-family="'JetBrains Mono','Fira Code',ui-monospace,monospace" font-size="48" font-weight="700" fill="#E6690E" letter-spacing="1"> obs</text>
+  <rect x="540" y="49" width="14" height="38" fill="#E6690E"/>
+</svg>
diff --git a/web/src/lib/assets/logo-stacked-dark.svg b/web/src/lib/assets/logo-stacked-dark.svg
index 3ba5c74..5a14136 100644
--- a/web/src/lib/assets/logo-stacked-dark.svg
+++ b/web/src/lib/assets/logo-stacked-dark.svg
@@ -1,10 +1,10 @@
 <svg width="360" height="360" viewBox="0 0 360 360" xmlns="http://www.w3.org/2000/svg">
   <!-- Stacked lockup for dark backgrounds / square placements -->
   <g transform="translate(80,30) scale(1.0)">
-    <rect x="30" y="142" width="140" height="42" rx="20" fill="#E6690E" transform="rotate(-1.5 100 163)"/>
-    <rect x="48" y="106" width="104" height="38" rx="18" fill="#FF8A00" transform="rotate(2.5 100 125)"/>
-    <rect x="64" y="73" width="72" height="34" rx="16" fill="#FF9D2E" transform="rotate(-3 100 90)"/>
-    <rect x="78" y="43" width="44" height="30" rx="14" fill="#FFB157" transform="rotate(3.5 100 58)"/>
+    <path d="M32,184 L20,172 L26,155 L18,146 L46,138 L82,144 L112,134 L150,140 L176,150 L182,168 L170,184 L142,192 L100,182 L64,190 Z" fill="#E6690E"/>
+    <path d="M54,144 L42,134 L50,118 L44,108 L68,100 L96,106 L118,98 L142,106 L156,116 L150,132 L160,142 L132,150 L100,140 L70,148 Z" fill="#FF8A00"/>
+    <path d="M68,106 L58,96 L64,82 L60,72 L80,66 L100,72 L116,64 L132,74 L138,86 L130,98 L138,106 L112,112 L88,104 L72,110 Z" fill="#FF9D2E"/>
+    <path d="M80,70 L72,60 L78,48 L74,40 L92,36 L106,42 L116,34 L126,44 L124,56 L130,66 L108,72 L92,64 L82,70 Z" fill="#FFB157"/>
   </g>
   <text x="180" y="290" font-family="'JetBrains Mono','Fira Code',ui-monospace,monospace" font-size="42" font-weight="700" fill="#F2F2F2" letter-spacing="-1" text-anchor="middle">cairn <tspan fill="#FF8A00">obs</tspan></text>
 </svg>
diff --git a/web/src/lib/assets/logo-stacked-light.svg b/web/src/lib/assets/logo-stacked-light.svg
new file mode 100644
index 0000000..b187a8f
--- /dev/null
+++ b/web/src/lib/assets/logo-stacked-light.svg
@@ -0,0 +1,10 @@
+<svg width="360" height="360" viewBox="0 0 360 360" xmlns="http://www.w3.org/2000/svg">
+  <!-- Stacked lockup for light backgrounds / square placements -->
+  <g transform="translate(80,30) scale(1.0)">
+    <path d="M32,184 L20,172 L26,155 L18,146 L46,138 L82,144 L112,134 L150,140 L176,150 L182,168 L170,184 L142,192 L100,182 L64,190 Z" fill="#E6690E"/>
+    <path d="M54,144 L42,134 L50,118 L44,108 L68,100 L96,106 L118,98 L142,106 L156,116 L150,132 L160,142 L132,150 L100,140 L70,148 Z" fill="#FF8A00"/>
+    <path d="M68,106 L58,96 L64,82 L60,72 L80,66 L100,72 L116,64 L132,74 L138,86 L130,98 L138,106 L112,112 L88,104 L72,110 Z" fill="#FF9D2E"/>
+    <path d="M80,70 L72,60 L78,48 L74,40 L92,36 L106,42 L116,34 L126,44 L124,56 L130,66 L108,72 L92,64 L82,70 Z" fill="#FFB157"/>
+  </g>
+  <text x="180" y="290" font-family="'JetBrains Mono','Fira Code',ui-monospace,monospace" font-size="42" font-weight="700" fill="#111315" letter-spacing="-1" text-anchor="middle">cairn <tspan fill="#E6690E">obs</tspan></text>
+</svg>
diff --git a/web/src/lib/components/NavSidebar.svelte b/web/src/lib/components/NavSidebar.svelte
index a92a549..446fc16 100644
--- a/web/src/lib/components/NavSidebar.svelte
+++ b/web/src/lib/components/NavSidebar.svelte
@@ -9,9 +9,10 @@
 		type CurrentSession,
 		type LocalSession
 	} from '$lib/api';
-	import { getTheme, setTheme, type Theme } from '$lib/theme.svelte';
+	import { getTheme, setTheme, isLight, type Theme } from '$lib/theme.svelte';
 	import { getDensity, toggleDensity } from '$lib/density.svelte';
-	import logo from '$lib/assets/logo-horizontal-dark.svg';
+	import logoDark from '$lib/assets/logo-horizontal-dark.svg';
+	import logoLight from '$lib/assets/logo-horizontal-light.svg';
 
 	let {
 		onOpenPalette,
@@ -84,7 +85,7 @@
 <aside class="sidebar" class:mobile-open={mobileOpen}>
 	<div class="brand">
 		<a href="/" class="brand-link" onclick={onCloseMobile}>
-			<img src={logo} alt="Cairn OBS" class="brand-logo" />
+			<img src={isLight() ? logoLight : logoDark} alt="Cairn OBS" class="brand-logo" />
 		</a>
 		<button type="button" class="close-mobile" onclick={onCloseMobile} aria-label="Close menu">✕</button>
 	</div>
diff --git a/web/src/lib/theme.svelte.ts b/web/src/lib/theme.svelte.ts
index 900eef0..0504b4b 100644
--- a/web/src/lib/theme.svelte.ts
+++ b/web/src/lib/theme.svelte.ts
@@ -34,10 +34,33 @@ const initial = readStored();
 let theme = $state<Theme>(initial);
 apply(initial);
 
+// Tracks the OS preference live (not just at load) so "system" stays
+// accurate across a theme change the user makes outside the app, same
+// as app.css/tokens.css's own `prefers-color-scheme` media query does
+// automatically for CSS -- anything in JS that needs to know "is the UI
+// actually light right now" (e.g. picking a light/dark logo asset) has
+// to track this the same way, or it drifts from what's on screen.
+let prefersLight = $state(
+	typeof window !== 'undefined' ? window.matchMedia('(prefers-color-scheme: light)').matches : false
+);
+if (typeof window !== 'undefined') {
+	window
+		.matchMedia('(prefers-color-scheme: light)')
+		.addEventListener('change', (e) => (prefersLight = e.matches));
+}
+
 export function getTheme(): Theme {
 	return theme;
 }
 
+// Whether the rendered UI is in light mode right now -- explicit
+// "light", or "system" while the OS itself prefers light. Mirrors
+// app.css's `html[data-theme='light']` / `prefers-color-scheme: light`
+// precedence exactly.
+export function isLight(): boolean {
+	return theme === 'light' || (theme === 'system' && prefersLight);
+}
+
 export function setTheme(t: Theme) {
 	theme = t;
 	apply(t);
diff --git a/web/src/routes/+page.svelte b/web/src/routes/+page.svelte
index 5353a38..3829e79 100644
--- a/web/src/routes/+page.svelte
+++ b/web/src/routes/+page.svelte
@@ -3,7 +3,9 @@
 	// /search (the old root; every prior link/shortcut/drill-down that
 	// used to point at "/" expecting the query page now points at
 	// "/search" explicitly, see NavSidebar/CommandPalette/drilldown.ts).
-	import logo from '$lib/assets/logo-stacked-dark.svg';
+	import logoDark from '$lib/assets/logo-stacked-dark.svg';
+	import logoLight from '$lib/assets/logo-stacked-light.svg';
+	import { isLight } from '$lib/theme.svelte';
 	import { Button } from '$lib/components/ui';
 
 	const shortcuts: { href: string; label: string; hint: string }[] = [
@@ -15,7 +17,7 @@
 </script>
 
 <main>
-	<img src={logo} alt="Cairn OBS" class="logo" />
+	<img src={isLight() ? logoLight : logoDark} alt="Cairn OBS" class="logo" />
 	<p class="tagline">
 		One query bar for filter/stats queries and free-text search across every host and service
 		you're shipping logs from.
diff --git a/web/static/icons/favicon-16.png b/web/static/icons/favicon-16.png
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index f09003e..36b590b 100644
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diff --git a/web/static/icons/favicon-32.png b/web/static/icons/favicon-32.png
index dad619d..1b9499e 100644
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diff --git a/web/static/icons/favicon-48.png b/web/static/icons/favicon-48.png
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diff --git a/web/static/icons/favicon-512.png b/web/static/icons/favicon-512.png
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